Lichess analysis key bindings

In analysis, creates additionnal keyboard shortcuts to simulate inaccurracies/mistakes/blunders/request-analysis/learn-from-your-mistakes/next clicks. I created that before my PR to Lichess ( https://github.com/lichess-org/lila/pull/12443 ), but since I don't have reviews and things don't move, I'm releasing a client-side Chrome plugin that does the same thing. Note that the screenshot isn't what you'll see but is what my PR is trying to add.