Add Contributions Guide

CONTRIBUTIONS.md

@@ -0,0 +1,31 @@
+# Contribution Guide
+## Style Guide
+Code should adhere to the following principles:
+- Use underscores, not dashes in filenames
+- Do not use the name `main.rs` for a file
+- Add tests for new features
+- Follow Rust conventions and be consistent with existing code
+- When in doubt, run `cargo fmt`
+
+## Pull Requests
+Pull Requests are the best way to propose changes to the SDK. We actively welcome any and all pull requests! To do so,
+- Fork the repo and create your branch from `dev`
+- Add tests if you've introduced new functionality that should be tested
+- Update the relevant documentation if new functionality is introduced, or current functionality is altered
+- Ensure the test suite passes (`cargo test`)
+- Make the pull request!
+
+Give pull requests a descriptive title. Examples of a good pull request title include:
+- fix(enhanced_transactions): Issue with URL Format
+- feat(zk_api): Add Get Private Balance 
+- docs(webhooks): Add New Section on Deleting Webhooks
+
+Examples of bad pull requests include:
+- fix #76129
+- update docs
+- fix bugs
+
+If there is a related issue, please reference it in the pull request's text.
+
+## License
+By contributing, you agree that your contributions will be licensed under its MIT License. Thus, when you submit code changes, your submissions are understood to be under the [following license](https://github.com/helius-labs/helius-rust-sdk/blob/dev/LICENSE)