Feat/pro block settings

[iftakharul-islam]

Summary by CodeRabbit

• New Features

  • Added Contributors, Advanced Contributors, Table of Contents, Helpful Feedback and Contact Modal blocks with editor previews, responsive controls, and frontend behaviors.

• Bug Fix / Refactor

  • Moved to manifest-driven block registration and modernized build/runtime registration and asset handling.

• Chores

  • Removed legacy compiled front-end bundles and some generated styles; updated dev tooling versioning and asset registrations.

• Documentation

  • Added README documenting shared block styling helpers.