Add codeql workflow

.github/workflows/codeql.yml

@@ -0,0 +1,36 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  schedule:
+    - cron: '30 06 * * 6'
+
+env:
+  GO_VERSION: 1.22.1
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+    steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v4
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: go
+          build-mode: manual
+      - name: Build
+        run: go build -tags netgo,osusergo -o ./cmd/mysync/mysync ./cmd/mysync/...
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:go"