[FEAT] Add Config UI

[G4PLS]

• [ ] Create configuration UI in ULX

Optional:

• [x] Make Config UI accessible over the F1 menu provided by TTT2

[vertiKarl]

Repositories for inspiration: ttt2mg - Adds a custom F1 menu entry for admins ttt2-role_debugger - Adds a custom F1 menu entry for users (though it is admin only? and broken) ttt2-super-soda - Adds a regular Server addons Tab (what TTT2 recommends) ttt2-air-to-surface-missile - Adds an entry in the ulx addons tab (which also gets added to the F1 menu by TTT2)

Would probably use something like ttt2mg as dttt is a base which a lot of addons could depend on (like ttt2mg). It also adds a menu in the user side F1 menu to enable/disable popups. We could use that to let users setup their Discord id locally!!

[vertiKarl]

The relevant api docs: CLGAMEMODEMENU - Seems to be the actual class used to instantiate menus in the F1 menu, as seen in ttt2mg for example. To add UI the script seems to be required to be located inside /lua/terrortown/menus/gamemode

To group it inside the "server addons" f1 menu, we should instead put the file inside /lua/terrortown/menus/gamemode/server_addons

To add actual buttons, sliders and so on, we need to use vgui.CreateTTT2Form() which is defined here

and finally. I found the API reference for menu items: https://api-docs.ttt2.neoxult.de/class/PANEL

[vertiKarl]

For the muted/deafened icons I'd recommend checking out this addon: ttt2-advanced_spectator as it adds stuff to the HUD.