added contributor guide and updated owner

CONTRIBUTING.md

@@ -0,0 +1,46 @@
+# Contributing to Tekton
+
+Thank you for contributing your time and expertise to Tekton. This
+document describes the contribution guidelines for the project.
+
+**Note:** Before you start contributing, you must read and abide by our **[Code of Conduct](./code-of-conduct.md)**.
+
+
+## Contributing to Tekton code
+
+To set up your environment and begin working on our code, see [Developing for Tekton](./DEVELOPMENT.md).
+
+[The `community` repo](https://github.com/tektoncd/community) contains information on the following:
+
+- [Development standards](https://github.com/tektoncd/community/blob/main/standards.md), including:
+  - [Writing high quality code](https://github.com/tektoncd/community/blob/main/standards.md#coding-standards)
+  - [Adopting good development principles](https://github.com/tektoncd/community/blob/main/standards.md#principles)
+  - [Writing useful commit messages](https://github.com/tektoncd/community/blob/main/standards.md#commit-messages)
+- [Contacting other contributors](https://github.com/tektoncd/community/blob/main/contact.md)
+- [Tekton development processes](https://github.com/tektoncd/community/tree/main/process#readme), including:
+  - [Finding things to work on](https://github.com/tektoncd/community/tree/main/process#finding-something-to-work-on)
+  - [Proposing new features](https://github.com/tektoncd/community/tree/main/process#proposing-features)
+  - [Performing code reviews](https://github.com/tektoncd/community/tree/main/process#reviews)
+  - [Becoming a community member and maintainer](https://github.com/tektoncd/community/blob/main/process/contributor-ladder.md)
+- [Making changes to the Tekton API](api_compatibility_policy.md#approving-api-changes)
+- [Understanding the Tekton automation infrastructure](https://github.com/tektoncd/plumbing)
+
+Additionally, please read the following resources specific to Tekton Pipelines:
+
+- [Tekton Pipelines GitHub project](https://github.com/orgs/tektoncd/projects/3)
+- [Tekton Pipelines roadmap](roadmap.md)
+- [Tekton Pipelines API compatibility policy](api_compatibility_policy.md)
+
+For support in contributing to specific areas, contact the relevant [Tekton Pipelines Topical Owner(s)](topical-ownership.md). 
+
+## Contributing to Tekton documentation
+
+If you want to contribute to Tekton documentation, see the
+[Tekton Documentation Contributor's Guide](https://github.com/tektoncd/website/blob/main/content/en/docs/Contribute/_index.md).
+
+This guide describes:
+- The contribution process for documentation
+- Our standards for writing high quality content
+- Our formatting conventions
+
+It also includes a primer for getting started with writing documentation and improving your writing skills.

OWNERS

@@ -5,6 +5,7 @@ approvers:
 - pramodbindal
 - savitaashture
 - vdemeester
+- waveywaves
 
 reviewers:
 - anithapriyanatarajan