ci: add codeql and ci workflows

.github/dependabot.yml

@@ -0,0 +1,15 @@
+version: 2
+
+updates:
+  - package-ecosystem: 'npm'
+    directory: '/'
+    schedule:
+      interval: 'weekly'
+    labels:
+      - 'dependencies'
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'weekly'
+    labels:
+      - 'dependencies'

.github/workflows/codeql.yml

@@ -0,0 +1,38 @@
+name: 'CodeQL'
+
+on:
+  push:
+    branches:
+      - dev
+      - prod
+  pull_request:
+    branches:
+      - dev
+  schedule:
+    - cron: '0 8 * * 1'
+  merge_group:
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-cpu16-ram64
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ['javascript']
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          queries: security-and-quality
+          languages: ${{ matrix.language }}
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2