feat(ci): add release workflow for .deb and static binary

Add Forgejo Actions workflow that builds and publishes releases:
- Triggers on tag push (v*) or manual workflow dispatch
- Builds static binary using musl target
- Creates .deb package with shell completions
- Uploads artifacts to Forgejo Releases

Requires RELEASE_TOKEN secret to be configured in repository settings.

.forgejo/workflows/release.yml

@@ -0,0 +1,82 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  release:
+    name: Build and Release
+    runs-on: nix
+
+    steps:
+      - name: Check out Repository
+        uses: https://git.konstantinfickel.de/actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          fetch-depth: 0
+
+      - name: Extract version and handle tagging
+        id: version
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            # Manual trigger: read version from Cargo.toml
+            VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)".*/\1/')
+            TAG="v${VERSION}"
+
+            # Check if tag already exists
+            if git rev-parse "$TAG" >/dev/null 2>&1; then
+              echo "::error::Version ${VERSION} is already released"
+              exit 1
+            fi
+
+            # Create and push the tag
+            git tag "$TAG"
+            git push origin "$TAG"
+
+            echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
+            echo "TAG=${TAG}" >> $GITHUB_OUTPUT
+          else
+            # Tag push trigger: extract version from tag
+            VERSION="${GITHUB_REF_NAME#v}"
+            echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
+            echo "TAG=${GITHUB_REF_NAME}" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Build .deb package
+        run: nix build .#streamd-deb -o result-deb
+
+      - name: Build static binary
+        run: nix build .#streamd-musl -o result-musl
+
+      - name: Prepare release artifacts
+        run: |
+          mkdir -p release
+          cp result-deb release/streamd_${{ steps.version.outputs.VERSION }}_amd64.deb
+          cp result-musl/bin/streamd release/streamd-${{ steps.version.outputs.VERSION }}-linux-x86_64
+
+      - name: Create release
+        uses: https://code.forgejo.org/actions/forgejo-release@v2
+        with:
+          direction: upload
+          url: https://git.konstantinfickel.de
+          repo: kfickel/streamd
+          token: ${{ secrets.RELEASE_TOKEN }}
+          tag: ${{ steps.version.outputs.TAG }}
+          release-dir: release
+          release-notes: |
+            ## streamd ${{ steps.version.outputs.VERSION }}
+
+            ### Debian/Ubuntu
+            ```bash
+            wget <release-url>/streamd_${{ steps.version.outputs.VERSION }}_amd64.deb
+            sudo dpkg -i streamd_${{ steps.version.outputs.VERSION }}_amd64.deb
+            ```
+
+            ### Static binary
+            ```bash
+            wget <release-url>/streamd-${{ steps.version.outputs.VERSION }}-linux-x86_64
+            chmod +x streamd-*-linux-x86_64
+            sudo mv streamd-*-linux-x86_64 /usr/local/bin/streamd
+            ```