Documentation

[WandererXII]

(https://github.com/WandererXII/lishogi/issues/353, https://github.com/WandererXII/lishogi/issues/459) I would like to have a nice documentation page with links to helpful articles. Right now we have - https://lishogi.org/page/documentation (similarly on lichess - https://lichess.org/page/documentation), but that doesn't look good nor it is very convenient and easy to navigate. Not sure about the format tho...

List of documentations that I think would be useful:

• [ ] Rules of shogi
• [ ] Move notations (western, Japanese, Kitao-Kawasaki)
• [ ] Time control
• [x] Kif
• [ ] CSA
• [ ] SFEN
• [ ] USI
• [ ] General site usage
• [ ] Studies
• [ ] How to create BOT accounts
• [ ] Non visual user interface
• [ ] Streaming
• [ ] Coach
• [ ] Puzzle themes