Initial commit: CinemaTrailers4Jellyfins plugin

Adapted from Trailers4Jellyfin: keeps TMDB/YouTube trailer downloading,
the scheduled task, language/source/date filters, and trailer rotation,
but drops cinema-mode/IIntroProvider entirely. Each trailer now ships in
its own fake-movie folder (placeholder video + locked NFO + trailer) for
use with a Cinema Mode / trailer pre-roll plugin.

.github/workflows/release.yml

@@ -0,0 +1,103 @@
+name: Publish Release
+
+# NOTE: This repo lives on a private Gitea instance
+# (https://www.git.quarantinedstudio.com/mvezina/CinemaTrailers4Jellyfins), not GitHub.
+# Gitea Actions understands a compatible subset of GitHub Actions syntax, but:
+#   - GitHub-hosted actions (actions/checkout, actions/setup-dotnet) must be reachable
+#     from your Gitea runner (directly, via a mirror, or vendored) to be usable as-is.
+#   - softprops/action-gh-release talks to the GitHub API and will NOT work against
+#     Gitea — it has been replaced below with direct calls to the Gitea Releases API
+#     via curl, which needs a GITEA_TOKEN secret (an access token with repo write scope).
+# Treat this file as a starting template: verify runner/action availability and the
+# release-API calls against your instance before relying on it.
+
+on:
+  push:
+    tags:
+      - 'v*.*.*.*'
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITEA_TOKEN }}
+          fetch-depth: 0
+
+      - name: Setup .NET 9
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '9.0.x'
+
+      - name: Get version from tag
+        id: version
+        run: echo "VERSION=${GITHUB_REF_NAME#v}" >> "$GITHUB_OUTPUT"
+
+      - name: Build
+        run: |
+          dotnet publish \
+            Jellyfin.Plugin.CinemaTrailers4Jellyfins/Jellyfin.Plugin.CinemaTrailers4Jellyfins.csproj \
+            --configuration Release \
+            --output bin
+
+      - name: Package
+        run: |
+          VERSION="${{ steps.version.outputs.VERSION }}"
+          # Always include the plugin DLL itself, then all third-party dependencies.
+          # Exclude Jellyfin/MediaBrowser framework DLLs — the server already has those loaded.
+          DEPS=$(find bin -name "*.dll" \
+            | grep -Ev "/(Jellyfin\.|MediaBrowser\.|Microsoft\.|System\.|netstandard|mscorlib)" \
+            | tr '\n' ' ')
+          zip -j "cinematrailers4jellyfins_${VERSION}.zip" \
+            bin/Jellyfin.Plugin.CinemaTrailers4Jellyfins.dll \
+            $DEPS
+
+      - name: Checksum
+        id: checksum
+        run: |
+          VERSION="${{ steps.version.outputs.VERSION }}"
+          echo "MD5=$(md5sum cinematrailers4jellyfins_${VERSION}.zip | cut -d' ' -f1)" >> "$GITHUB_OUTPUT"
+
+      - name: Update manifest.json
+        run: |
+          pip install pyyaml --quiet
+          python3 update_manifest.py "${{ steps.version.outputs.VERSION }}" "${{ steps.checksum.outputs.MD5 }}"
+
+      - name: Commit manifest
+        run: |
+          git config user.name "gitea-actions"
+          git config user.email "gitea-actions@quarantinedstudio.com"
+          git add manifest.json
+          git commit -m "chore: update manifest.json for v${{ steps.version.outputs.VERSION }}" || echo "No changes to commit"
+          git fetch origin main
+          git rebase origin/main
+          git push origin HEAD:main
+
+      - name: Create Gitea release and upload asset
+        env:
+          GITEA_SERVER: https://www.git.quarantinedstudio.com
+          GITEA_REPO: mvezina/CinemaTrailers4Jellyfins
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          VERSION="${{ steps.version.outputs.VERSION }}"
+          TAG="${{ github.ref_name }}"
+          ZIP="cinematrailers4jellyfins_${VERSION}.zip"
+          BODY="See build.yaml for the changelog. To install, add ${GITEA_SERVER}/${GITEA_REPO}/raw/branch/main/manifest.json as a plugin repository in Jellyfin -> Admin -> Plugins -> Repositories."
+
+          RELEASE_ID=$(curl -sf -X POST \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "{\"tag_name\": \"${TAG}\", \"name\": \"Release ${TAG}\", \"body\": \"${BODY}\"}" \
+            "${GITEA_SERVER}/api/v1/repos/${GITEA_REPO}/releases" \
+            | python3 -c "import sys, json; print(json.load(sys.stdin)['id'])")
+
+          curl -sf -X POST \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            -F "attachment=@${ZIP}" \
+            "${GITEA_SERVER}/api/v1/repos/${GITEA_REPO}/releases/${RELEASE_ID}/assets?name=${ZIP}"