ci: add codeql security config

Author: sinedied

.github/codeql/codeql-config.yml

@@ -0,0 +1,23 @@
+name: CodeQL config
+
+# Needed to customize the security-extended query suite
+disable-default-queries: true
+queries:
+  - uses: security-extended
+query-filters:
+  - exclude:
+      id: actions/missing-workflow-permissions
+threat-models: local
+paths-ignore:
+  - "/release_workspace.js"
+  - "**/create-entrypoints.js"
+  - "examples/*.ts"
+  - "examples/**/*.ts"
+  - "**/*.test.ts"
+  - "**/examples/*.ts"
+  - "**/examples/**/*.ts"
+  - "**/*.test.ts"
+  - "**/tests/**/*.ts"
+  - "**/__tests__/**/*.ts"
+  - "/libs/langchain-scripts/**/*.ts"
+  - "docs/core_docs/scripts/*.js"

.github/workflows/codeql.yml

@@ -0,0 +1,46 @@
+name: CodeQL
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    - cron: "36 12 * * 2"
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: "ubuntu-latest"
+    permissions:
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: actions
+          - language: javascript-typescript
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          config-file: ./.github/codeql/codeql-config.yml
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{matrix.language}}"
+          output: results-${{matrix.language}}
+
+      - name: Store sarif file as artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: codeql-results-${{matrix.language}}
+          path: results-${{matrix.language}}