Fixed unreliable extension startup on LinkedIn and other SPAs.

Changed

• Rebranding: Renamed the extension to Smart Keyword Highlighter across all platforms and documentation.
• Improved Stability: Hardened initialization to better handle Single Page Applications (SPAs) like LinkedIn where the page body may be replaced dynamically.
• Privacy: Removed unnecessary activeTab permission to follow the principle of least privilege.
• Store Presence: Optimized extension description and titles for better clarity.

Fixed

• Improved highlight re-attachment logic when the web page body is swapped during site navigation.

Added

• Updated documentation and new screenshots in the options page and README.

Version 1.3

• Improved startup reliability on dynamic sites like LinkedIn by waiting for document.body and reattaching if the body is replaced.
• Added lightweight diagnostic logging for startup/body swaps.
• Expanded options-page documentation and clarified settings behavior.

Advanced Keyword Registry:
Persistent Memory: Remembers highlighted keywords per-domain or globally (.).
Retroactive Highlighting: If a keyword is discovered mid-sentence, it gets added to the registry. On subsequent visits (or retroactively on the same page), it will be highlighted even if it appears at the start of a sentence.
Configurable Scope: Define maximum registry size and scope (global vs. domain-specific).