docs: Contribution guide

CONTRIBUTING.md

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+# Contributing
+
+## Reporting Issues and Suggesting Features
+If you encounter what you believe is a bug, please [report an issue](https://github.com/software-mansion/TypeGPU/issues/new). For suggesting new features, you should first [start a discussion](https://github.com/software-mansion/TypeGPU/discussions/new/choose) if one does not already exist. Feel free to also join and comment on [existing discussions](https://github.com/software-mansion/TypeGPU/discussions).
+
+
+## Development
+
+To contribute by resolving an open issue or developing a new feature, please adhere to the following workflow:
+
+1. Fork this repository.
+2. Create a new feature branch from the `main` branch.
+3. Ensure that the `pnpm dev` script is running at all times during development.
+4. Stage your changes and commit them. We recommend following the [Conventional Commit Specification](https://www.conventionalcommits.org/en/v1.0.0/) for commit messages.
+5. Make sure all the tests pass when running `pnpm test`.
+6. Submit the PR for review.
+
+After your pull request is submitted, we will review it at as soon as possible. We may suggest changes or request additional improvements, so please enable [Allow edits from maintainers](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request-from-a-fork) on your PR.
+
+
+## Release To-Do
+
+1. Create new branch, update package number in package.json, run `pnpm install`
+2. Take the built package from code sandbox CI and test the changes on StackBlitz (optional)
+3. Merge to main
+4. `cd packages/typegpu`
+5. `pnpm prepare-package`
+6. `cd dist`
+7. `pnpm publish —dry-run` (if alpha, then add tag alpha)
+8. If everything looks okay, then `pnpm publish` (if alpha, then add tag alpha)
+9.  Rebase release branch on main
+10. Generate and edit release notes on GitHub