chore: add contribution manual

Author: naiyerasif

Diff for: CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contribution manual
+
+Thank you for your interest in contributing to **compris**. There are many ways to contribute and we appreciate all of them.
+
+> [!TIP]
+> **For new contributors**: Visit <https://github.com/firstcontributions/first-contributions> for helpful information on contributing to open source projects 
+
+- [Create an issue](https://github.com/Microflash/compris/issues/new) to discuss a change before you start working on it.
+
+## Commit messages
+
+Use [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/) while making changes or creating PRs.
+
+## Reviewing the PRs
+
+Use [conventional comments](https://conventionalcomments.org/) to provide feedback on PRs.