Adds Internet admin midi (#30457)

* Adds Internet admin midi

* Moves global regex into proc (shell_url_scrub)

* Moves shelleo to world
Adds quotes around the command in shelleo, to encapsulate it

* Admins can stop playing web sounds

* Revised internet midi extension order
Moved m4a to least preferred,
as it can potentially carry non-aac or non-mpeg-3 audio

* Kills \n in web sound

* play_web_sound availability based on config

* play web sound and shelleo tweaks

istypeless for in play web sound & readability parenthesis around binary AND
add return index defines for shelleo proc

* Security fix for play web sound

code/modules/goonchat/browserOutput.dm

@@ -13,6 +13,7 @@ GLOBAL_DATUM_INIT(iconCache, /savefile, new("data/iconCache.sav")) //Cache of ic
 	var/cookieSent   = FALSE // Has the client sent a cookie for analysis
 	var/broken       = FALSE
 	var/list/connectionHistory //Contains the connection history passed from chat cookie
+	var/adminMusicVolume = 100 //This is for the Play Global Sound verb
 
 /datum/chatOutput/New(client/C)
 	owner = C
@@ -79,6 +80,9 @@ GLOBAL_DATUM_INIT(iconCache, /savefile, new("data/iconCache.sav")) //Cache of ic
 		if("analyzeClientData")
 			data = analyzeClientData(arglist(params))
 
+		if("setMusicVolume")
+			data = setMusicVolume(arglist(params))
+
 	if(data)
 		ehjax_send(data = data)
 
@@ -120,6 +124,16 @@ GLOBAL_DATUM_INIT(iconCache, /savefile, new("data/iconCache.sav")) //Cache of ic
 		data = json_encode(data)
 	C << output("[data]", "[window]:ehjaxCallback")
 
+/datum/chatOutput/proc/sendMusic(music, pitch)
+	var/list/music_data = list("adminMusic" = url_encode(url_encode(music)))
+	if(pitch)
+		music_data["musicRate"] = pitch
+	ehjax_send(data = music_data)
+
+/datum/chatOutput/proc/setMusicVolume(volume = "")
+	if(volume)
+		adminMusicVolume = Clamp(text2num(volume), 0, 100)
+
 //Sends client connection details to the chat to handle and save
 /datum/chatOutput/proc/sendClientData()
 	//Get dem deets