Add Github badges to README (#3)

This pull request integrates automated test coverage reporting with
Coveralls.io and displays dynamic badges in the README files.

Changes:

- coverage is now automatically collected and reported on every push and pull request
- included GitHub badges for test coverage, release version, CI status,
primary language used in repo and license

Author: Hoodie-Huuuuu

.github/workflows/test.yml

@@ -49,6 +49,13 @@ jobs:
       - name: "Measuring test coverage"
         run: "make test/cover"
 
+      - name: "Upload coverage to Coveralls"
+        uses: "coverallsapp/github-action@v2"
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          file: "coverage.out"
+          format: "golang"
+
   ### PERFORMANCE ###
 
   performance:

README.md

@@ -1,5 +1,22 @@
 # Synthetic Data Values Generator (SDVG)
 
+[![Release][release-badge]][release-url]
+[![CI][actions-badge]][actions-url]
+[![Coverage Status][test-coverage-badge]][test-coverage-url]
+[![Language][language-badge]][language-url]
+[![License][license-badge]][license-url]
+
+[release-badge]: https://img.shields.io/github/v/release/tarantool/sdvg?filter=!latest
+[release-url]: https://github.com/tarantool/sdvg/releases
+[actions-badge]: https://img.shields.io/github/check-runs/tarantool/sdvg/master
+[actions-url]: https://github.com/tarantool/sdvg/actions
+[test-coverage-badge]: https://img.shields.io/coverallsCoverage/github/tarantool/sdvg?branch=master
+[test-coverage-url]: https://coveralls.io/github/tarantool/sdvg?branch=master
+[language-badge]: https://img.shields.io/github/languages/top/tarantool/sdvg
+[language-url]: https://github.com/tarantool/sdvg/search?l=go
+[license-badge]: https://img.shields.io/github/license/tarantool/sdvg
+[license-url]: ./LICENSE
+
 ## Language
 
 - **English**

README.ru.md

@@ -1,5 +1,22 @@
 # Synthetic Data Values Generator (SDVG)
 
+[![Release][release-badge]][release-url]
+[![CI][actions-badge]][actions-url]
+[![Coverage Status][test-coverage-badge]][test-coverage-url]
+[![Language][language-badge]][language-url]
+[![License][license-badge]][license-url]
+
+[release-badge]: https://img.shields.io/github/v/release/tarantool/sdvg?filter=!latest
+[release-url]: https://github.com/tarantool/sdvg/releases
+[actions-badge]: https://img.shields.io/github/check-runs/tarantool/sdvg/master
+[actions-url]: https://github.com/tarantool/sdvg/actions
+[test-coverage-badge]: https://img.shields.io/coverallsCoverage/github/tarantool/sdvg?branch=master
+[test-coverage-url]: https://coveralls.io/github/tarantool/sdvg?branch=master
+[language-badge]: https://img.shields.io/github/languages/top/tarantool/sdvg
+[language-url]: https://github.com/tarantool/sdvg/search?l=go
+[license-badge]: https://img.shields.io/github/license/tarantool/sdvg
+[license-url]: ./LICENSE
+
 ## Язык
 
 - [English](README.md)