Documentation: Create dedicated CONTRIBUTING.md for developers

[josephaw1022]

Description

Currently, information for developers and contributors is located at the bottom of the README.md. To keep the README concise and focused on users/consumers, we should move the developer-specific instructions to a dedicated CONTRIBUTING.md (or DEVELOPER.md) file.

Expected Changes

• Create CONTRIBUTING.md with:
  • Prerequisites (Go, Task, Kind, Docker, etc.)
  • Local development workflow (task quick-dev)
  • In-cluster deployment workflow (task quick-deploy)
  • Any other contributor guidelines.
• Link to CONTRIBUTING.md from the README.md.
• Remove the detailed "Local Development" section from the README.md to reduce clutter.

Why is this needed?

It improves the readability of the main README.md and provides a standard location for potential contributors to find onboarding information.