move to webpack for cache busting and other benefits

[fcaps]

closes #496

this is the first step to move to webpack.

• moved all "public/js" files into a new directoy "src/frontend", so we can run webpack and grunt without issues
• added a new static-asset entry for "dist" in express
• removed all related grunt tasks for js files.
• removed empty "account.js"
• moved octokit to node_modules

known issues:

• development is running a "prod" configuration for webpack, not optimal, but it works for now
• webpackManifestJS could be lazy-loaded, or hot-reloaded when on development

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (develop@ef213c4). Click here to learn what that means.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #497   +/-   ##
==========================================
  Coverage           ?   41.93%           
==========================================
  Files              ?       47           
  Lines              ?     1116           
  Branches           ?      128           
==========================================
  Hits               ?      468           
  Misses             ?      634           
  Partials           ?       14           

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[Sheikah45]

Although I am curious why webpack and not vite.

Purely from an academic standpoint.

[fcaps]

webpack is well known, but thb. i was not evaluating builders.
i know everything i need right now is covered by webpack, and for other developers it would be easy to understand whats happening.
What i heard from vite is they are focused more on dev, and not so on prod, but can't really give you a example.

[fcaps]

i also guess moving from webpack to vite is easier than from grunt to vite.
cleaning up the code was harder, than actual switch. never knew what is going on, and had to go in deeply to see if a file was used/working.

[Sheikah45]

Understood, I was mostly curious as a framework I have been using made the switch from webpack to vite so was just curious if it was a general movement or just a framework preference.