docs: Add link to pages in contribution guide (google#983)

* docs: Update contributing.md

* docs: add link to pages in contrubition

* docs: move link to docs

* docs: changed test+cov command

---------

Co-authored-by: Anton Golub <antongolub@antongolub.com>

Author: LifeforDream

docs/contributing.md

@@ -1,7 +1,19 @@
-# How to Contribute
+# Contribution Guide
 
-We'd love to accept your patches and contributions to this project. There are
-just a few small guidelines you need to follow.
+zx is a fully [open-source project](https://github.com/google/zx), which is developing by the community for the community. 
+We welcome contributions of any kind, including but not limited to:
+* Bug reports
+* Feature requests
+* Code contributions
+* Documentation improvements
+* Discussions
+
+https://google.github.io/zx/contribution
+
+## Community Guidelines
+
+This project follows [Google's Open Source Community Guidelines](https://opensource.google/conduct/).
+In short: all contributors are treated with respect and fairness.
 
 ## Contributor License Agreement
 
@@ -15,14 +27,28 @@ You generally only need to submit a CLA once, so if you've already submitted one
 (even if it was for a different project), you probably don't need to do it
 again.
 
+## How to Contribute
+Before proposing changes, look for similar ones in the project's [issues](https://github.com/google/zx/issues) and [pull requests](https://github.com/google/zx/pulls). If you can't decide, create a new [discussion](https://github.com/google/zx/discussions) topic, and we will help you figure it out. When ready to move on:
+* Prepare your development environment.
+  * Ensure you have Node.js 20+ installed.
+  * Bash is essential for running zx scripts. Linux and macOS users usually have it installed by default. Consider using [Windows Subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/install) or [Git Bash](https://git-scm.com/downloads) if you are on Windows.
+* Fork [the repository](https://github.com/google/zx).
+* Create a new branch.
+* Make your changes.
+  * If you are adding a new feature, please include additional tests. The coverage threshold is 98%.
+  * Create a [conventional-commits](https://www.conventionalcommits.org/en/v1.0.0/) compliant messages.
+* Ensure that everything is working:
+  * `npm run fmt` to format your code.
+  * `npm run test:coverage` to run the tests.
+* Push the changes to your fork.
+* Create a pull request.
+  * Describe your changes in detail.
+  * Reference any related issues if applicable.
+
 ## Code Reviews
 
-All submissions, including submissions by project members, require review. We
-use GitHub pull requests for this purpose. Consult
-[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
-information on using pull requests.
+All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult [GitHub Help](https://help.github.com/articles/about-pull-requests/) for more information on using pull requests.
 
-## Community Guidelines
+## License
 
-This project follows [Google's Open Source Community
-Guidelines](https://opensource.google/conduct/).
+The project is licensed under the [Apache-2.0](https://github.com/google/zx?tab=Apache-2.0-1-ov-file#readme)