Replace plugin workflows with a basic one

Author: idastambuk

.github/workflows/push.yaml

@@ -1,19 +1,40 @@
-name: Plugins - CI
+name: CI
 
 on:
   push:
     branches:
       - main
   pull_request:
 
-permissions: {}
+permissions:
+  contents: read
 
 jobs:
-  ci:
-    name: CI
-    uses: grafana/plugin-ci-workflows/.github/workflows/ci.yml@main # zizmor: ignore[unpinned-uses]
-    permissions:
-      contents: read
-      id-token: write
-    with:
-      plugin-version-suffix: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || '' }}
+  check:
+    name: Automated checks
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Setup environment
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+
+      - name: Install dependencies
+        run: yarn install --immutable
+
+      - name: Spellcheck
+        run: yarn spellcheck
+
+      - name: Lint files
+        run: yarn lint
+
+      - name: Run tests
+        run: yarn test:ci
+
+      - name: Run build
+        run: yarn build