ci: add minimal CI (noop) and CodeQL

Author: CoderDeltaLAN

.github/workflows/ci.yml

@@ -2,9 +2,20 @@ name: CI
 on:
   push:
     branches: [main]
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   noop:
+    if: ${{ (github.event_name == 'push' && startsWith(github.ref,'refs/heads/main')) || (github.event_name == 'pull_request' && github.event.pull_request.draft == false && contains(github.event.pull_request.labels.*.name,'ready')) }}
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - run: echo OK
+      - run: echo "CI OK"

.github/workflows/codeql.yml

@@ -0,0 +1,24 @@
+name: CodeQL
+on:
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+permissions:
+  contents: read
+  security-events: write
+
+concurrency:
+  group: codeql-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    if: ${{ (github.event_name == 'push' && startsWith(github.ref,'refs/heads/main')) || (github.event_name == 'pull_request' && github.event.pull_request.draft == false && contains(github.event.pull_request.labels.*.name,'ready')) }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: github/codeql-action/init@v3
+        with: { languages: python }
+      - uses: github/codeql-action/analyze@v3