Client side interactive analysis

[gbtami]

Utilize Fairy-Stockfish WASM port https://github.com/ianfab/stockfish.wasm

• [x] Show engine PV/depth/score in finished games when moving in move list
• [x] Enable to play new moves without changing the move list
• [x] Show new moves/variations in move list
• [ ] Create mini board previews when hovering over PV moves
• [x] Make PV moves clickable (create variation moves in move list panel)
• [x] Create settings dialog for Threads, Hash, PV lines options similar to lichess
• [x] Create Analysis in main menu
• [x] Local analysis with nnue

[renyhp]

In fact, variations don't seem to work properly. The variation is always saved as move 1, and this also messes up the navigation with the arrows (it would also be great if the keyboard arrows worked as shortcut to navigate through the moves!)

By the way this website is awesome, keep up the good job!

[gbtami]

I noticed this bug also myself. Just forgot to fix. Thx for the notice!

[gbtami]

Moved from #904 Just a little suggestion :

This is our current analysis mode:

it only shows a branch of move list, and an arrow on the board:

It will be great if it can show other branches and arrows, and switch to a position by clicking on the move, just like lichess.

...and it will be awesome if there is a small window showing suggested move and telling your blunders.

Thank you developers! Pychess is the best website I've ever seen.