Add CodeQL analysis workflow (#40)

* Add CodeQL analysis workflow

.github/code-ql-config.yml

@@ -0,0 +1,8 @@
+---
+name: "CodeQL Python Config"
+
+disable-default-queries: true
+source-root: src/synthesized_insight
+queries:
+  - uses: security-and-quality
+...

.github/workflows/code-ql.yml

@@ -0,0 +1,27 @@
+---
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    steps:
+    - uses: actions/checkout@v3
+
+    # Initializes the CodeQL tools for scanning.
+    - uses: github/codeql-action/init@v2
+      with:
+        languages: python
+        config-file: ./.github/code-ql-config.yml
+
+    - uses: github/codeql-action/analyze@v2
+...