docs: Add 5 Whiteboard Works extensions to the homepage

[shadoath]

Adding five extensions from Whiteboard Works that are built with WXT:\n\n- PlayFaster (fppcbkhpahkbgijkdcpjgjmhpfbmfiih) — Enhanced playback speed control for online videos and audio. Works on YouTube, Vimeo, Loom, and most e-learning platforms.\n- LatTab (eiocjaocpmackhbaffoejkcmnfbdpgpj) — Learn Latin With Every New Tab. Proverbs, root words, quiz mode, and search.\n- Vim What? (ngbehgnlcdjkbnihgpkgdangbhemidge) — Interactive Vim command reference: color-coded keyboard, prefix overlays, progressive lessons, and progress tracking.\n- FRED (bjdbcabacnlmbpcmiapcdfancfgcakfn) — Fraud Recognition Easy Detection. Protects users from phishing and fraud in real time.\n- Clear Wisdom (jijfmgoijddfmlcdghopbkdpelbpmjdm) — Gems of wisdom from James Clear's 3-2-1 newsletter on every new tab.\n\nAll five are built with WXT.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.56%. Comparing base (3205802) to head (274cc73).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2207      +/-   ##
==========================================
+ Coverage   79.43%   79.56%   +0.13%     
==========================================
  Files         130      130              
  Lines        3798     3798              
  Branches      854      854              
==========================================
+ Hits         3017     3022       +5     
+ Misses        697      693       -4     
+ Partials       84       83       -1     

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