feat: add GitHub Actions workflow for building and releasing plugin assets

Author: pikann

.github/workflows/release.yml

@@ -0,0 +1,93 @@
+name: Build and Release Plugin Assets
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.24"
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Build backend WASM
+        working-directory: backend
+        run: |
+          set -euo pipefail
+          mkdir -p ../release/backend
+          GOOS=wasip1 GOARCH=wasm go build -buildmode=c-shared -o ../release/backend/github.wasm .
+
+      - name: Build frontend
+        working-directory: frontend
+        run: |
+          set -euo pipefail
+          bun install --frozen-lockfile
+          bun run build
+
+      - name: Build MCP
+        working-directory: mcp
+        run: |
+          set -euo pipefail
+          bun install --frozen-lockfile
+          bun run build
+
+      - name: Collect release files
+        run: |
+          set -euo pipefail
+          mkdir -p release/frontend
+          cp -R frontend/dist release/frontend/dist
+
+          mkdir -p release/mcp
+          cp -R mcp/dist release/mcp/dist
+
+          mkdir -p release/migrations
+          cp -R backend/migrations/. release/migrations/
+
+          cp plugin.json release/plugin.json
+
+      - name: Create archives
+        run: |
+          set -euo pipefail
+          tar -czf github-backend-wasm.tar.gz -C release/backend github.wasm
+          tar -czf github-frontend-dist.tar.gz -C release/frontend dist
+          tar -czf github-mcp-dist.tar.gz -C release/mcp dist
+          tar -czf github-migrations.tar.gz -C release migrations
+          tar -czf github-plugin-manifest.tar.gz -C release plugin.json
+
+      - name: Generate checksums
+        run: |
+          set -euo pipefail
+          sha256sum github-backend-wasm.tar.gz \
+            github-frontend-dist.tar.gz \
+            github-mcp-dist.tar.gz \
+            github-migrations.tar.gz \
+            github-plugin-manifest.tar.gz > checksums.txt
+
+      - name: Publish GitHub Release assets
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          files: |
+            github-backend-wasm.tar.gz
+            github-frontend-dist.tar.gz
+            github-mcp-dist.tar.gz
+            github-migrations.tar.gz
+            github-plugin-manifest.tar.gz
+            checksums.txt