chore: Move to RSpack

[juliusknorr]

This is a first attempt to try our RSpack which is also used by talk now.

Reference in talk nextcloud/spreed#16070

	Webpack	RSpack
npm run dev	35s	1,78s
Size of loaded js in files with an open editor	3,1 MB	1,7MB

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[juliusknorr]

Warning still to figure out

WARNING in ./node_modules/moment/min/moment-with-locales.js 2159:16-50
  ⚠ Module not found: Can't resolve './locale' in '/Users/julius/repos/nextcloud/server/apps/text/node_modules/moment/min'
      ╭─[2159:16]
 2157 │                 oldLocale = globalLocale._abbr;
 2158 │                 aliasedRequire = require;
 2159 │                 aliasedRequire('./locale/' + name);
      ·                 ──────────────────────────────────
 2160 │                 getSetGlobalLocale(oldLocale);
 2161 │             } catch (e) {
      ╰────


Rspack compiled with 1 warning in 1.87 s