Update development mode so that changes to static/js files are reflected without needing a process restart

[Zequez]

Hi! At the moment of writing, whenever you change one of the static/js files the changes are not copied to the /dist folder. I'm not sure if this is intentional, but it makes for a poor development experience, as the development process takes about 30 seconds to restart.

Anyway, right now I changed the copy-to-dist.mjs file and added a --watch option and a watch:static script to package.json and I've got myself the functionality I needed locally. Would there be any interest into making this a formal PR? Also, what's the deal with the duplicated scripts on build-tools? I found no references to the.js versions of the scripts that are also on the .mjs format, could they be safely removed?

On a personal note I would advocate for using something other than Webpack, like Snowpack or Vite and take advantage of ESM module loading on the browsers.

[vfat0]

Hiya! All this stuff has just been copied over from the original (yieldfarming.info), I still don't know what an mjs file is a year later :) A PR would be very much welcome.

[G-Lex]

@Zequez Did you get around to making the changes for the PR?

[imasters11]

@Zequez I would appreciate this as well