docs: update README.md

[JayJay1024]

PR-Codex overview

This PR enhances the README.md by adding instructions for setting up and running various components of the helix-ui project. It includes new sections for the Helix, Home, and Assets package, along with relevant commands for development and building.

Detailed summary

• Added setup instructions for cloning the helix-ui repository and installing dependencies.
• Introduced a section for the Helix app with development and build commands.
• Added a section for the Home app, indicating its deprecation and providing commands.
• Included a note about accessing media resources in the Assets package.

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