Add shared workflows

.github/ISSUE_TEMPLATE/bug.yml

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+name: "Bug report"
+description: Report an unexpected problem or unintended behavior.
+labels: ["needs triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ### Before you start
+
+        **Want to fix the problem yourself?** This project is open source and we welcome fixes and improvements from the community!
+
+        ↩ Check the project [CONTRIBUTING.md](../blob/main/CONTRIBUTING.md) guide to see how to get started.
+
+        ---
+  - type: textarea
+    id: problem
+    attributes:
+      label: What information was incorrect, unhelpful, or incomplete?
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: What did you expect to see?
+    validations:
+      required: true
+  - type: textarea
+    id: references
+    attributes:
+      label: Do you have any supporting links, references, or citations?
+      description: Link to information that helps us confirm your issue.
+  - type: textarea
+    id: more-info
+    attributes:
+      label: Do you have anything more you want to share?
+      description: For example, steps to reproduce a bug, screenshots, screen recordings, or sample code

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: MDN GitHub Discussions
+    url: https://github.com/orgs/mdn/discussions
+    about: Does the issue involve a lot of pages, or are you not sure how it can be split into actionable tasks? Consider starting a discussion first.
+  - name: MDN Web Docs on Discourse
+    url: https://discourse.mozilla.org/c/mdn/learn/250
+    about: Need help with assessments on MDN Web Docs? We have a support community for this purpose on Discourse.
+  - name: Help with code
+    url: https://stackoverflow.com/
+    about: If you are stuck and need help with code, StackOverflow is a great resource.

.github/PULL_REQUEST_TEMPLATE

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+<!-- 🙌 Thanks for contributing! Adding details below will help us to merge your PR faster. -->
+
+### Description
+
+<!-- ✍️ Summarize your changes in one or two sentences -->
+
+### Motivation
+
+<!-- ❓ Why are you making these changes and how do they help? -->
+
+### Additional details
+
+<!-- 🔗 Link to documentation, bug trackers, source control, or other places providing more context -->
+
+### Related issues and pull requests
+
+<!-- 🔨 If this fully resolves a GitHub issue, use "Fixes #123" -->
+<!-- 👉 Highlight related pull requests using "Relates to #123" -->
+<!-- ❗ If another pull request should be merged first, use "**Depends on:** #123" -->

.github/config.yml

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+# Configuration for welcome - https://github.com/behaviorbot/welcome
+# Configuration for new-issue-welcome - https://github.com/behaviorbot/new-issue-welcome
+
+# Comment to be posted to on first time issues
+newIssueWelcomeComment: >
+  👋 Thanks for opening your first issue here! If you're reporting a 🐞 bug, please make sure you include steps to reproduce it.
+
+# Configuration for new-pr-welcome - https://github.com/behaviorbot/new-pr-welcome
+# Comment to be posted to on PRs from first time contributors in your repository
+newPRWelcomeComment: >
+  💖 Thanks for opening this pull request! 💖
+
+  Here is a list of things that will help get it across the finish line:
+
+  - If this is a new or updated CSS interactive example, please ensure that you followed the [CSS styleguide](https://github.com/mdn/interactive-examples/blob/main/CSS-Example-Style-Guide.md)
+  - If this is a new or updated JavaScript interactive example, please ensure that you followed the [JavaScript styleguide](https://github.com/mdn/interactive-examples/blob/main/JS-Example-Style-Guide.md)
+  - If your changes affects any of the steps in our [contribution docs](https://github.com/mdn/interactive-examples/blob/main/CONTRIBUTING.md), please also make the relevant changes there.
+
+# Configuration for first-pr-merge - https://github.com/behaviorbot/first-pr-merge
+# Comment to be posted to on pull requests merged by a first time user
+firstPRMergeComment: >
+  Congrats on merging your first pull request! 🎉🎉🎉
+
+# It is recommend to include as many gifs and emojis as possible

.github/workflows/codeql.yml

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+name: "CodeQL"
+
+on:
+  push:
+    branches: ["main"]
+    paths-ignore:
+      - "**.md"
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: ["main"]
+    paths-ignore:
+      - "**.md"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      matrix:
+        # Add the language(s) you want to analyze here as an array of strings
+        # for example: ['javascript'] or ['python', 'javascript']
+        language: ["javascript"]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2
+        with:
+          category: "/language:${{matrix.language}}"

.github/workflows/idle.yml

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+# This workflow is hosted at: https://github.com/mdn/workflows/blob/main/.github/workflows/idle.yml
+# Docs for this workflow: https://github.com/mdn/workflows/blob/main/README.md#idle
+name: "Label idle issues"
+
+on:
+  schedule:
+    - cron: "0 8 * * *"
+
+jobs:
+  mark-as-idle:
+    uses: mdn/workflows/.github/workflows/idle.yml@main
+    with:
+      target-repo: "mdn/webextensions-examples"

.github/workflows/welcome-bot.yml

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+# This workflow is hosted at: https://github.com/mdn/workflows/blob/main/.github/workflows/allo-allo.yml
+# Docs for this workflow: https://github.com/mdn/workflows/blob/main/README.md#allo-allo
+name: "AlloAllo"
+
+on:
+  issues:
+    types:
+      - opened
+  pull_request_target:
+    branches:
+      - main
+    types:
+      - opened
+      - closed
+
+jobs:
+  allo-allo:
+    uses: mdn/workflows/.github/workflows/allo-allo.yml@main
+    with:
+      target-repo: "mdn/todo-vue"
+      issue-welcome: |
+        It looks like this is your first issue. Welcome! 👋
+        One of the project maintainers will be with you as soon as possible. We
+        appreciate your patience. To safeguard the health of the project, please
+        take a moment to read our [code of conduct](../blob/main/CODE_OF_CONDUCT.md).
+      pr-welcome: |
+        It looks like this is your first pull request. 🎉
+        Thank you for your contribution! One of the project maintainers will triage
+        and assign the pull request for review. We appreciate your patience. To
+        safeguard the health of the project, please take a moment to read our
+        [code of conduct](../blob/main/CODE_OF_CONDUCT.md).
+      pr-merged: |
+        Congratulations on your first merged pull request. 🎉 Thank you for your contribution!
+        Did you know we have a [project board](https://github.com/orgs/mdn/projects/25) with high-impact contribution opportunities?
+        We look forward to your next contribution.