Add Forgejo namespace release workflow

.forgejo/workflows/release.yml

@@ -0,0 +1,60 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  release:
+    name: Release Build
+    runs-on: namespace-profile-linux-medium
+    steps:
+      - name: Checkout
+        uses: https://code.forgejo.org/actions/checkout@v4
+        with:
+          token: ${{ github.token }}
+          fetch-depth: 0
+
+      - name: Bootstrap Nix
+        shell: bash
+        run: |
+          set -euo pipefail
+          chmod +x Scripts/ci/ensure-nix.sh
+          Scripts/ci/ensure-nix.sh
+
+      - name: Build release artifacts
+        shell: bash
+        env:
+          RELEASE_REF: ${{ github.ref_name }}
+        run: |
+          set -euo pipefail
+          ref="${RELEASE_REF:-manual-${GITHUB_SHA::7}}"
+          export RELEASE_REF="${ref}"
+          chmod +x Scripts/ci/build-release-artifacts.sh
+          nix develop .#ci -c Scripts/ci/build-release-artifacts.sh
+
+      - name: Upload release artifacts
+        uses: https://code.forgejo.org/actions/upload-artifact@v4
+        with:
+          name: burrow-release-${{ github.ref_name }}
+          path: dist/*
+          if-no-files-found: error
+
+      - name: Publish Forgejo release
+        if: startsWith(github.ref, 'refs/tags/')
+        shell: bash
+        env:
+          RELEASE_TAG: ${{ github.ref_name }}
+          API_URL: ${{ github.api_url }}
+          REPOSITORY: ${{ github.repository }}
+          TOKEN: ${{ github.token }}
+        run: |
+          set -euo pipefail
+          chmod +x Scripts/ci/publish-forgejo-release.sh
+          nix develop .#ci -c Scripts/ci/publish-forgejo-release.sh