fix: update references to point to rtcamp/snapwp monorepo

[ashutoshgautams]

What

Update repository references in snapwp-helper from rtcamp/headless to rtcamp/snapwp

Why

Align with the new monorepo structure where the package has been moved to rtcamp/snapwp

Related Issue(s):

How

• Search and replace repository URLs in snapwp-helper package
• Update from https://github.com/rtCamp/headless/ to https://github.com/rtCamp/snapwp/
• Update any related documentation references

Testing Instructions

1. Check all repository links in the codebase point to the new location
2. Verify package dependencies and references resolve correctly
3. Ensure no broken links remain

Screenshots

Additional Info

This is a straightforward repository reference update with no functional changes.

Checklist

• I have read the Contribution Guidelines.
• My code is tested to the best of my abilities.
• My code passes all lints (PHPCS, PHPStan, ESLint, etc.).
• My code has detailed inline documentation.
• I have added unit tests to verify the code works as intended.
• I have updated the project documentation accordingly.