ci: add Gitea release workflow on tag push

Creates an automated Gitea release with changelog when a tag (v*) is pushed.
Requires GITEA_TOKEN secret in Gitea with repository write access.

.gitea/workflows/release.yaml

@@ -0,0 +1,66 @@
+name: Create Release
+on:
+  push:
+    tags:
+      - "v*"
+jobs:
+  release:
+    runs-on: shell
+    steps:
+      - name: Checkout
+        run: |
+          git fetch origin --prune --tags
+          git checkout -f "${{ gitea.ref_name }}"
+
+      - name: Generate Release Notes
+        id: notes
+        run: |
+          PREV_TAG="$(git tag --sort=-creatordate | head -2 | tail -1 || echo '')"
+          if [ -n "$PREV_TAG" ]; then
+            RANGE="${PREV_TAG}..${{ gitea.ref_name }}"
+            NOTES="$(git log --oneline --no-decorate "${RANGE}" 2>/dev/null || git log --oneline --no-decorate -20)"
+          else
+            NOTES="$(git log --oneline --no-decorate -30)"
+          fi
+          echo "NOTES<<EOF" >> "$GITHUB_ENV"
+          echo "$NOTES" >> "$GITHUB_ENV"
+          echo "EOF" >> "$GITHUB_ENV"
+
+          echo "VERSION=${{ gitea.ref_name }}" >> "$GITHUB_ENV"
+
+          echo "=== Release Notes ==="
+          echo "$NOTES"
+
+      - name: Build
+        run: |
+          cd /var/www/atom-nexst/
+          pnpm install --frozen-lockfile
+          pnpm prisma:generate
+          export SKIP_ENV_VALIDATION=1
+          pnpm build
+
+      - name: Create Release
+        run: |
+          # Use the Gitea API to create a release
+          BODY="## EpicNext-CMS ${{ env.VERSION }}
+
+          ### Changes
+          ${{ env.NOTES }}
+
+          ---
+          _Automated release from Gitea Actions_
+          "
+
+          curl -s -X POST "${{ gitea.api_url }}/repos/${{ gitea.repository }}/releases" \
+            -H "Authorization: token ${{ secrets.GITEA_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            -d "$(cat <<-ENDJSON
+          {
+            "tag_name": "${{ env.VERSION }}",
+            "name": "${{ env.VERSION }}",
+            "body": $(echo "$BODY" | jq -Rs '.'),
+            "draft": false,
+            "prerelease": false
+          }
+          ENDJSON
+          )"