docs: add commit and pull request convention guidelines

added Conventional Commits guidelines
documented recommended pull request title format
added branch naming examples
documented common commit types and usage examples
improved contributor workflow documentation

Author: georgidhristov

CONTRIBUTING.md

@@ -5,7 +5,7 @@ Thank you for your interest in contributing to DebugProbe.AspNetCore.
 ## Getting Started
 
 Clone the repository and open the solution:
-
+co
 ```bash
 git clone https://github.com/georgidhristov/DebugProbe.AspNetCore.git
 ```
@@ -30,23 +30,69 @@ Run the sample API project to test DebugProbe functionality and UI behavior duri
 
 ## Branch Naming
 
-Use descriptive lowercase branch names:
+Use descriptive lowercase branch names.
 
-Example:
+Examples:
 
 ```text
 feature/add-request-filtering
+fix/handle-empty-response-body
+refactor/split-compare-engine
+ci/update-github-actions
+docs/update-contributing-guide
+```
+
+## Commit Message Convention
+
+This repository follows the [Conventional Commits](https://www.conventionalcommits.org/) specification.
+
+Format:
+
+```text
+type: short description
+```
+
+Examples:
+
+```text
+feat: add payload type badges
+fix: handle empty compare bodies
+refactor: split compare engine
+docs: update README screenshots
+ci: run automated tests in GitHub Actions
+test: add request persistence tests
 ```
 
+Common commit types:
+
+- `feat` → new feature
+- `fix` → bug fix
+- `refactor` → internal code restructuring
+- `docs` → documentation changes
+- `test` → automated tests
+- `ci` → CI/CD and GitHub Actions
+- `chore` → maintenance and tooling updates
+
 ## Pull Requests
 
 Before opening a pull request:
 
 - Ensure the project builds successfully
+- Ensure all automated tests pass
 - Keep pull requests focused and small
 - Provide a clear description of the change
 - Link related issues when applicable
 
+Pull request titles should also follow Conventional Commits.
+
+Examples:
+
+```text
+feat: add request filtering
+fix: persist requests on unhandled exceptions
+docs: improve contributing guidelines
+```
+
 ## Coding Style
 
 - Keep implementations simple and maintainable