Add pull request template for contributor guidelines

Added a pull request template to guide contributors in providing necessary information and ensuring code quality.

Author: wadecalvin9

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,23 @@
+## Description
+Please provide a summary of the change and which issue is fixed.
+
+- **Type of Change**: (Bug fix, New Feature, Breaking Change, Documentation)
+- **Related Issue**: Closes #(issue number)
+
+## Testing
+Have you tested this change in a lab environment?
+
+- [ ] Tested on Windows 11 / Windows 10
+- [ ] Tested on Linux
+- [ ] Unit tests added/updated
+- [ ] Agent functionality verified against C2 server
+
+## Checklist for C2 Contribution
+- [ ] My code follows the project's style guidelines.
+- [ ] I have performed a self-review of my own code.
+- [ ] I have added comments for complex logic (e.g., Syscalls, Hell's Gate).
+- [ ] I have updated the documentation (README, Wiki) accordingly.
+- [ ] My changes generate no new compiler warnings.
+- [ ] I have added tests that prove my fix is effective or that my feature works.
+
+## Screenshots (if appropriate)