Adds CI pipeline and codecov coverage badge to README

Summary: Adds CI pipeline through github actions that triggers unit tests on each platform on every pull request/push. Also adds codecov badge with coverage to README.

Reviewed By: rodrigodesalvobraz

Differential Revision: D56557155

fbshipit-source-id: 656267e78f461d01702e54c0e170d46dbf9573dc

.github/workflows/CI.yml

@@ -0,0 +1,36 @@
+name: Workflow for CI and Codecov Action
+on: [push, pull_request]
+jobs:
+  run:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    env:
+      OS: ${{ matrix.os }}
+      PYTHON: '3.9'
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: 3.9
+    - name: Install dependencies
+      run: |
+          pip install pytest
+          pip install pytest-cov
+          pip install -e .
+    - name: Generate coverage report
+      run: |
+        pytest --cov=./ --cov-report=xml
+    - name: Upload coverage to Codecov
+      if: success() || failure()
+      uses: codecov/codecov-action@v4
+      with:
+        env_vars: OS,PYTHON
+        file: ./coverage.xml
+        flags: unittests
+        name: codecov-umbrella
+        token: ${{ secrets.CODECOV_TOKEN }}
+        slug: facebookresearch/Pearl
+        verbose: true

README.md

@@ -8,6 +8,7 @@
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Support Ukraine](https://img.shields.io/badge/Support-Ukraine-FFD500?style=flat&labelColor=005BBB)](https://opensource.fb.com/support-ukraine)
+[![codecov](https://codecov.io/gh/facebookresearch/Pearl/graph/badge.svg?token=CARFOP3E30)](https://codecov.io/gh/facebookresearch/Pearl)
 
 More details of the library at our [official website](https://pearlagent.github.io).