Add LCP module

[dilirity]

Fixes HOG-187

Proposed changes

• Add support for LCP feature.

Testing instructions

• Checkout this branch;
• Build the project from /Extension using npm run build and npm run build:chrome (if using firefox, use npm run build:firefox;
• Load as an unpacked extension in Chrome (not sure how to do in Firefox, but ask google for help on that). Make sure to point to Extension and not the root of the repo when loading;
• Open a page that has the LCP optimized and check the extension UI - it should say that LCP is Working.