allow customizing HestiaCP with js/php (#2747)
* allow customizing HestiaCP with js/php
make a folder where everything that loads init.js will load additional .js/.php files, allowing people to customize their HestiaCP control panels.
I must admit, I have not studied the HestiaCP plugin system, and if it turns out that the plugin system is superior to this folder, please tell me about it :) I couldn't really find documentation on the plugin system
* code-breaking typos
* make CI run again (CI is bugging out)
* simplify code
i think the only thing htmlentities did was to encode "+" characters, which isn't required when using RAWurlencode, and im not even sure it was actually required with normal urlencode.
* DirectoryIterator isn't static-callable
ick
* make CI run again (i think it's bugging out?)