rename v2.0 to EurKEY Next, add ANSI support, normalize Caps Lock, fix v1.4

- rename v2.0 → EurKEY Next across all files, scripts, workflows, website
- rename bundle EurKey-macOS → EurKEY-macOS
- add §/± to ¬ dead key (¬+s → §, ¬+S → ±) for ANSI keyboard compatibility
- normalize Caps Lock = Shift across all four layouts, remove custom Caps bindings
- fix v1.4: revert accidental Caps/ẞ changes, correct changelog to super/subscript swap
- update README: remove duplicate v1.2–v1.4 changelog, reorder versions (Next first)
- update website: ISO+ANSI feature card, EurKEY Next branding, consistent version order

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/build.yml

@@ -4,12 +4,12 @@ on:
   push:
     branches: [main]
     paths:
-      - 'EurKey-macOS.bundle/**'
+      - 'EurKEY-Next.bundle/**'
       - 'scripts/**'
       - 'spec/**'
   pull_request:
     paths:
-      - 'EurKey-macOS.bundle/**'
+      - 'EurKEY-Next.bundle/**'
       - 'scripts/**'
       - 'spec/**'
 
@@ -40,5 +40,5 @@ jobs:
       - name: upload DMG
         uses: actions/upload-artifact@v4
         with:
-          name: EurKEY-macOS-DMG
+          name: EurKEY-Next-DMG
           path: build/*.dmg