[Chore] add coverage report (#163)

* add coverage report

* restrict the coverage report from main branch

Author: zhongkechen

.github/workflows/build.yml

@@ -35,7 +35,7 @@ on:
       - 'pom.xml'
 
 permissions:
-  contents: read
+  contents: write
 
 jobs:
   build:
@@ -59,3 +59,17 @@ jobs:
 
       - name: Build and test
         run: mvn -B install --file pom.xml
+
+      - name: Generate JaCoCo Badge
+        if: ${{ github.ref == 'refs/heads/main' && matrix.java == 17 }}
+        uses: cicirello/jacoco-badge-generator@v2
+        with:
+          jacoco-csv-file: sdk/target/site/jacoco/jacoco.csv
+          badges-directory: sdk/target/site/jacoco
+
+      - name: Publish coverage report to GitHub Pages
+        if: ${{ github.ref == 'refs/heads/main' && matrix.java == 17 }}
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: docs/coverage
+          folder: sdk/target/site/jacoco

README.md

@@ -3,6 +3,7 @@
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 [![Java](https://img.shields.io/badge/java-%3E%3D17-brightgreen)](https://openjdk.org/)
 [![Build](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/build.yml/badge.svg)](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/build.yml)
+[![Coverage](https://raw.githubusercontent.com/aws/aws-durable-execution-sdk-java/refs/heads/docs/coverage/jacoco.svg)](https://aws.github.io/aws-durable-execution-sdk-java/)
 [![E2E Tests](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/e2e-tests.yml/badge.svg)](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/e2e-tests.yml)
 [![CodeQL](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/github-code-scanning/codeql/badge.svg)](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/github-code-scanning/codeql)
 [![Spotless](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/check-spotless.yml/badge.svg)](https://github.com/aws/aws-durable-execution-sdk-java/actions/workflows/check-spotless.yml)