chore(ci): add codeql code scanning (#169)

.github/dependabot.yml

@@ -10,7 +10,3 @@ updates:
   directory: /
   schedule:
     interval: daily
-- package-ecosystem: docker
-  directory: /
-  schedule:
-    interval: daily

.github/workflows/codeql.yaml

@@ -0,0 +1,50 @@
+name: codeql
+
+concurrency:
+  # Run only for most recent commit in PRs but for all tags and commits on main
+  # Ref: https://docs.github.com/en/actions/using-jobs/using-concurrency
+  group: ${{ github.workflow }}-${{ github.head_ref || github.sha }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+    branches:
+      - 'main'
+  schedule:
+    - cron: '27 0 * * 4'
+  workflow_dispatch: {}
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    timeout-minutes: ${{ fromJSON(vars.GHA_DEFAULT_TIMEOUT || 10) }}
+    name: analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+    - name: Install Go
+      uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
+      with:
+        go-version-file: go.mod
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@b6a472f63d85b9c78a3ac5e89422239fc15e9b3c # v3.28.1
+      with:
+        languages: ${{ matrix.language }}
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@b6a472f63d85b9c78a3ac5e89422239fc15e9b3c # v3.28.1
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@b6a472f63d85b9c78a3ac5e89422239fc15e9b3c # v3.28.1