ci: setup codecov coverage & badge

.github/workflows/coverage.yaml

@@ -50,6 +50,12 @@ jobs:
         run: |
           just coverage
 
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: lcov.info
+
       - name: Download Coveralls CLI
         if: ${{ env.COVERALLS_REPO_TOKEN != '' }}
         run: |

README.md

@@ -1,16 +1,16 @@
 # Pac-Man
 
-[![Tests Status][badge-test]][test] [![Build Status][badge-build]][build] [![If you're seeing this, Coveralls.io is broken again and it's not my fault.][badge-coverage]][coverage] [![Online Demo][badge-online-demo]][demo] [![Last Commit][badge-last-commit]][commits]
+[![Tests Status][badge-test]][test] [![Build Status][badge-build]][build] [![Code Coverage][badge-coverage]][coverage] [![Online Demo][badge-online-demo]][demo] [![Last Commit][badge-last-commit]][commits]
 
 [badge-test]: https://github.com/Xevion/Pac-Man/actions/workflows/tests.yaml/badge.svg
 [badge-build]: https://github.com/Xevion/Pac-Man/actions/workflows/build.yaml/badge.svg
-[badge-coverage]: https://coveralls.io/repos/github/Xevion/Pac-Man/badge.svg?branch=master
+[badge-coverage]: https://codecov.io/github/Xevion/Pac-Man/branch/master/graph/badge.svg?token=R2RBYUQK3I
 [badge-demo]: https://img.shields.io/github/deployments/Xevion/Pac-Man/github-pages?label=GitHub%20Pages
 [badge-online-demo]: https://img.shields.io/badge/GitHub%20Pages-Demo-brightgreen
 [badge-last-commit]: https://img.shields.io/github/last-commit/Xevion/Pac-Man
 [build]: https://github.com/Xevion/Pac-Man/actions/workflows/build.yaml
 [test]: https://github.com/Xevion/Pac-Man/actions/workflows/tests.yaml
-[coverage]: https://coveralls.io/github/Xevion/Pac-Man?branch=master
+[coverage]: https://codecov.io/github/Xevion/Pac-Man
 [demo]: https://xevion.github.io/Pac-Man/
 [commits]: https://github.com/Xevion/Pac-Man/commits/master