Settings: Added docs to server voice settings (#1496)

![image](https://github.com/TTT-2/TTT2/assets/13639408/a11e1bfe-0011-4d57-b022-576a5f284ed1)

---------

Co-authored-by: Histalek <16392835+Histalek@users.noreply.github.com>

lua/terrortown/lang/en.lua

@@ -2215,4 +2215,8 @@ L.label_crosshair_static_gap_length = "Enable static crosshair gap length"
 L.label_crosshair_size_gap = "Crosshair gap size multiplier"
 
 -- 2024-03-31
+L.help_locational_voice = "Proximity chat is TTT2's implementation of locational 3D voice. Players are only audible in a set radius around them and become quieter the farther away they are."
+L.help_locational_voice_prep = [[By default the proximity chat is disabled in the preparing phase. Change this convar to also use proximity chat in the preparing phase.
+
+Note: Proximity chat is always disabled during the post round phase.]]
 L.help_voice_duck_spectator = "Ducking spectators makes other spectators quieter in comparison to living players. This can be useful if one wants to listen closely to the discussions of the living players."

lua/terrortown/menus/gamemode/administration/chat.lua

@@ -53,14 +53,24 @@ function CLGAMEMODESUBMENU:Populate(parent)
 
     local form3 = vgui.CreateTTT2Form(parent, "header_voicechat_locational")
 
-    form3:MakeCheckBox({
+    form3:MakeHelp({
+        label = "help_locational_voice",
+    })
+
+    local enbLocVoice = form3:MakeCheckBox({
         serverConvar = "ttt_locational_voice",
         label = "label_locational_voice",
     })
 
+    form3:MakeHelp({
+        label = "help_locational_voice_prep",
+        master = enbLocVoice,
+    })
+
     form3:MakeCheckBox({
         serverConvar = "ttt_locational_voice_prep",
         label = "label_locational_voice_prep",
+        master = enbLocVoice,
     })
 
     local form4 = vgui.CreateTTT2Form(parent, "header_textchat")