[FEATURE] Add modern build with bot detection

[felixranesberger]

This pull request introduces an internal modern ESM build that will have an integrated bot detection built in.
This is a test to improve pagespeed in combination with Lux.

[einpraegsam]

If I try the feature branch I ran into problems when doing a npm run build - maybe the nvm version is different?

Failure:

npm run build

> lux@ build /var/www/PhpstormProjects/lux/Resources/Private/Build
> ./node_modules/gulp/bin/gulp.js build && unbuild

[12:44:55] Using gulpfile /var/www/PhpstormProjects/lux/Resources/Private/Build/gulpfile.js
[12:44:55] Starting 'build'...
[12:44:55] Starting 'jsFrontend'...
[12:44:57] Finished 'jsFrontend' after 1.77 s
[12:44:57] Starting 'jsBackend'...
[12:44:57] Finished 'jsBackend' after 211 ms
[12:44:57] Starting 'css'...
[12:44:57] Finished 'css' after 172 ms
[12:44:57] Finished 'build' after 2.16 s
sh: 1: unbuild: not found
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file sh
npm ERR! errno ENOENT
npm ERR! lux@ build: `./node_modules/gulp/bin/gulp.js build && unbuild`
npm ERR! spawn ENOENT
npm ERR! 
npm ERR! Failed at the lux@ build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/einpraegsam/.npm/_logs/2024-09-16T10_44_58_015Z-debug.log