Update KERN UX theme for KoliBri
- Changed repository cloning instructions in CONTRIBUTING.md to point to the correct repository.
- Updated development start command description in CONTRIBUTING.md for clarity.
- Added new global and local directories in the project structure in CONTRIBUTING.md.
- Clarified the use of
@kern-ux/nativepackage and local files in CONTRIBUTING.md. - Removed outdated examples and rules in CONTRIBUTING.md regarding CSS layers and Stylelint.
- Updated README.en.md to reflect changes in installation and usage instructions.
- Adjusted asset copying instructions in README.en.md for better clarity.
- Updated the main theme registration in README.md to use the new KERN_V2 constant.
- Updated package.json to reflect the new versioning and dependencies.
- Changed theme name from 'kern' to 'kern-v2' in src/index.ts for consistency.