chore: monorepo - plugin, backend und hilfsdaten in einem repo

- Eltern-Ordner ist jetzt EIN Git-Repo (statt getrennter Repos).
- root .gitignore haelt Secrets (.env), node_modules, DB und Build-Artefakte raus.
- release.ps1: manueller Release (ZIP bauen + ans Backend laden).
- root README mit Struktur und Release-Ablauf.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

gdpr-content-blocker/.gitea/workflows/release.yml

@@ -0,0 +1,51 @@
+name: Release
+
+# Tag a version (e.g. `git tag v1.1.0 && git push --tags`) to build the plugin
+# ZIP and publish it to the license backend, which then serves it to licensed
+# sites as an update.
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Derive version from tag
+        id: v
+        run: echo "version=${GITHUB_REF_NAME#v}" >> "$GITHUB_OUTPUT"
+
+      - name: Stamp version into the plugin header
+        env:
+          V: ${{ steps.v.outputs.version }}
+        run: |
+          sed -i "s/^ \* Version:.*/ * Version:     ${V}/" gdpr-content-blocker.php
+          sed -i "s/define( 'CB_VERSION', *'[^']*' )/define( 'CB_VERSION',  '${V}' )/" gdpr-content-blocker.php
+
+      - name: Build ZIP (top-level gdpr-content-blocker/ folder)
+        run: |
+          mkdir -p build/gdpr-content-blocker
+          rsync -a \
+            --exclude '.git' --exclude '.gitea' --exclude 'build' \
+            --exclude 'node_modules' --exclude '*.zip' \
+            ./ build/gdpr-content-blocker/
+          (cd build && zip -r ../gdpr-content-blocker.zip gdpr-content-blocker)
+
+      - name: Publish to license backend
+        env:
+          BACKEND: ${{ secrets.LICENSE_BACKEND_URL }}
+          TOKEN: ${{ secrets.LICENSE_ADMIN_TOKEN }}
+          V: ${{ steps.v.outputs.version }}
+        run: |
+          curl -fSs -X POST \
+            "${BACKEND}/api/v1/releases?product=gdpr-content-blocker&version=${V}" \
+            -H "X-Admin-Token: ${TOKEN}" \
+            -H "Content-Type: application/zip" \
+            -H "X-Tested: 6.7" \
+            -H "X-Requires-PHP: 8.1" \
+            --data-binary @gdpr-content-blocker.zip