Typo in sunfish_nnue.py lines 217 and 261

[foo123]

Line 217 is:

old_ep, old_kp, old_wc, old_bc = self.ep, self.kp, self.ec, self.bc

instead of self.wc (Position field) it has self.ec (no such field)

similar for line 261

[thomasahle]

Good point. The nnue version just isn't working well yet. But this would be good to fix.

[foo123]

I have made a javascript port of sunfish: sunfish.js and have ported both sunfish.py and sunfish_nnue.py versions.

I have also added maxdepth (eg go depth x) and stop uci options since they are needed in js. Other than that (and possibly some typos) I left the code as similar to py code as possible.