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/website.yml

@@ -38,7 +38,9 @@ jobs:
       - name: Generate layout JSON
         run: |
           mkdir -p eurkey-macos.eu/data
-          for ver in v1.2 v1.3 v1.4 v2.0; do
+          python3 scripts/parse_keylayout.py "src/keylayouts/EurKEY Next.keylayout" \
+            -o "eurkey-macos.eu/data/eurkey-next.json"
+          for ver in v1.2 v1.3 v1.4; do
             python3 scripts/parse_keylayout.py "src/keylayouts/EurKEY ${ver}.keylayout" \
               -o "eurkey-macos.eu/data/eurkey-${ver}.json"
           done