ci: add coverage workflow and Codecov badge

Author: shenxianpeng

.coverage

@@ -0,0 +1,30 @@
+name: Coverage
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7.0.1
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+          pip install pytest pytest-cov
+      - name: Run tests with coverage
+        run: |
+          pytest --cov=main --cov-report=xml --cov-report=term-missing main_test.py
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v7
+        with:
+          files: ./coverage.xml
+          flags: unittests
+          name: codecov-umbrella
+          fail_ci_if_error: true

.github/workflows/coverage.yml

@@ -5,6 +5,7 @@
 [![GitHub marketplace](https://img.shields.io/badge/Marketplace-commit--check--action-blue)](https://github.com/marketplace/actions/commit-check-action)
 [![commit-check](https://img.shields.io/badge/commit--check-enabled-brightgreen?logo=Git&logoColor=white&color=%232c9ccd)](https://github.com/commit-check/commit-check)
 [![slsa-badge](https://slsa.dev/images/gh-badge-level3.svg?color=blue)](https://github.com/commit-check/commit-check-action/blob/a2873ca0482dd505c93fb51861c953e82fd0a186/action.yml#L59-L69)
+[![codecov](https://codecov.io/gh/commit-check/commit-check-action/graph/badge.svg?token=G3R0LFO0YF)](https://codecov.io/gh/commit-check/commit-check-action)
 
 A GitHub Action for checking commit message formatting, branch naming, committer name, email, commit signoff, and more.