GregMat Buddy door parnavh

- Adds progress stats for PrepSwift
- Allows you to search through vocab mountain
- Remembers your playback speed on GregMat and PrepSwift
- Remembers if you dismissed a banner at the top of the website.
- Adds custom keybinds for vocab mountain
-- Moves to next word automatically after you mark it
-- Adds vim keybinds for cursor movement
- Tweak your enabled features in the extension options page