Makes TTS blips/enabled into one pref (#76558)

## About The Pull Request


![image](https://github.com/tgstation/tgstation/assets/53777086/6b06c212-060e-415f-b1fd-a6ac9f651627)

I actually do not know how to test this locally as I don't know how to
set TTS up, hope it works.

## Why It's Good For The Game

It's 2 buttons, one only works depending on the other, I don't think it
makes sense.

## Changelog

🆑
qol: The TTS and TTS Blips option is now one choiced preference.
/🆑

code/modules/client/preferences/migrations/tts_blip_migration.dm

@@ -0,0 +1,12 @@
+/// Previously, tts enabled/blip were individual buttons
+/// PR #76558 changed them to one dropdown choice.
+/// This migration transfers the player's existing preferences into the new dropdown
+
+/datum/preferences/proc/update_tts_blip_prefs()
+	var/sound_blips_enabled = savefile.get_entry("sound_tts_blips")
+	if(sound_blips_enabled)
+		write_preference(GLOB.preference_entries[/datum/preference/choiced/sound_tts], TTS_SOUND_BLIPS)
+		return
+	var/tts_enabled = savefile.get_entry("sound_tts")
+	if(!tts_enabled)
+		write_preference(GLOB.preference_entries[/datum/preference/choiced/sound_tts], TTS_SOUND_OFF)

code/modules/client/preferences/sounds.dm

@@ -28,16 +28,16 @@
 	savefile_key = "sound_instruments"
 	savefile_identifier = PREFERENCE_PLAYER
 
-/datum/preference/toggle/sound_tts
+/datum/preference/choiced/sound_tts
 	category = PREFERENCE_CATEGORY_GAME_PREFERENCES
 	savefile_key = "sound_tts"
 	savefile_identifier = PREFERENCE_PLAYER
 
-/datum/preference/toggle/sound_tts_blips
-	category = PREFERENCE_CATEGORY_GAME_PREFERENCES
-	savefile_key = "sound_tts_blips"
-	savefile_identifier = PREFERENCE_PLAYER
-	default_value = FALSE
+/datum/preference/choiced/sound_tts/init_possible_values()
+	return list(TTS_SOUND_ENABLED, TTS_SOUND_BLIPS, TTS_SOUND_OFF)
+
+/datum/preference/choiced/sound_tts/create_default_value()
+	return TTS_SOUND_ENABLED
 
 /datum/preference/numeric/sound_tts_volume
 	category = PREFERENCE_CATEGORY_GAME_PREFERENCES

code/modules/client/preferences_savefile.dm

@@ -5,7 +5,7 @@
 // You do not need to raise this if you are adding new values that have sane defaults.
 // Only raise this value when changing the meaning/format/name/layout of an existing value
 // where you would want the updater procs below to run
-#define SAVEFILE_VERSION_MAX 43
+#define SAVEFILE_VERSION_MAX 44
 
 /*
 SAVEFILE UPDATING/VERSIONING - 'Simplified', or rather, more coder-friendly ~Carn
@@ -91,6 +91,9 @@ SAVEFILE UPDATING/VERSIONING - 'Simplified', or rather, more coder-friendly ~Car
 	if (current_version < 41)
 		migrate_preferences_to_tgui_prefs_menu()
 
+	if (current_version < 44)
+		update_tts_blip_prefs()
+
 /datum/preferences/proc/update_character(current_version, list/save_data)
 	if (current_version < 41)
 		migrate_character_to_tgui_prefs_menu()