ci: add CI workflow with type check, build, verify and dry-run publish

Runs on every push and PR across all branches. Checks:
- TypeScript (server + admin)
- Build
- Strapi plugin verify
- Version not already published on npm
- Dry run publish

publish.yml now requires CI to pass before publishing to npm.

Author: devCluna

.github/workflows/ci.yml

@@ -0,0 +1,49 @@
+name: CI
+
+on:
+  push:
+    branches: ['**']
+  pull_request:
+    branches: ['**']
+  workflow_call:
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Type check (server)
+        run: npm run test:ts:back
+
+      - name: Type check (admin)
+        run: npm run test:ts:front
+
+      - name: Build
+        run: npm run build
+
+      - name: Verify plugin
+        run: npm run verify
+
+      - name: Check version not already published
+        run: |
+          VERSION=$(node -p "require('./package.json').version")
+          if npm view strapi-plugin-form-builder-cms@$VERSION version 2>/dev/null; then
+            echo "❌ Version $VERSION is already published on npm. Bump the version before merging."
+            exit 1
+          fi
+          echo "✅ Version $VERSION is not yet published."
+
+      - name: Dry run publish
+        run: npm publish --dry-run --access public

.github/workflows/publish.yml

@@ -9,6 +9,7 @@ on:
 jobs:
   publish:
     if: github.event.pull_request.merged == true
+    needs: ci
     runs-on: ubuntu-latest
 
     steps:
@@ -44,3 +45,6 @@ jobs:
           body: |
             Published from PR #${{ github.event.pull_request.number }}: ${{ github.event.pull_request.title }}
           generate_release_notes: true
+
+  ci:
+    uses: ./.github/workflows/ci.yml