Nethack for the web

See build.yml workflow for exact steps.

Current build is from NetHack-3.6.7_Released (ed600d9f0)

Install Emscripten v2.0.34 (0d24418f0eac4828f096ee070dae8472d427edaa) and activate. NodeJS v16 is required to fix ERR_INVALID_URL error

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
git pull
./emsdk install 2.0.34
./emsdk install node-16.20.0-64bit
./emsdk activate 2.0.34
./emsdk activate node-16.20.0-64bit
source ./emsdk_env.sh

Summary of the changes in lib/fixes36.diff to make Nethack 3.6 (most will not be needed anymore for 3.7 release)

• Changes all util programs to .js and use node to run it (only 3.6)
• Mount files to util programs with mount_nodefs.js since it's required to run them (see UTIL_CFLAGS) (only 3.6)
• Added new win type WEB_GRAPHICS for win/web + some config changes? (mostly from NetHackJS + BrowserHack)
  • Added player selection
  • Added rogue level flag
  • Separate JS callbacks for some calls to improve performance (Asyncify make calls too slow)
• Enable wizard mode in unixmain.c#authorize_wizard_mode
• Move iflags.suppress_price--; above inventory update in shk.c (only 3.6)

To run tools/generate.js, remove type: module from package.json. To lazy to find a solution for it.

• nethack_default.png - https://nethackwiki.com/wiki/File:3.6.1tiles32.png
• Nevanda.png - https://nethackwiki.com/mediawiki/images/2/26/Nevanda.png
• dawnhack_32.bmp - https://www.deviantart.com/dragondeplatino/art/DawnHack-NetHack-3-6-1-UnNetHack-5-1-0-416312313
• Chozo32-360.png - https://nethackwiki.com/wiki/File:Chozo32-360.png
• Sound effects from https://www.reddit.com/r/nethack/comments/16rcdxz/yhacsib_v02_a_continuation_of_the_2004_yhacs/

• https://github.com/coolwanglu/BrowserHack (3.4)
• https://github.com/apowers313/NetHackJS (> 3.7)