UI: Add hotkey to split file

Adds a frontend hotkey that splits the current recording file. Ideally,
this would only appear if file splitting is enabled like the replay
buffer hotkey, however that is an output hotkey which is hidden because
the output doesn't exist. This doesn't work here since the recording
output is obviously always available, but is unaware of whether file
splitting is enabled until the output is started.

UI/data/locale/en-US.ini

@@ -686,6 +686,7 @@ Basic.Main.StartVirtualCam="Start Virtual Camera"
 Basic.Main.StopRecording="Stop Recording"
 Basic.Main.PauseRecording="Pause Recording"
 Basic.Main.UnpauseRecording="Unpause Recording"
+Basic.Main.SplitFile="Split Recording File"
 Basic.Main.StoppingRecording="Stopping Recording..."
 Basic.Main.StopReplayBuffer="Stop Replay Buffer"
 Basic.Main.StoppingReplayBuffer="Stopping Replay Buffer..."

UI/window-basic-main.cpp

@@ -2452,6 +2452,15 @@ void OBSBasic::CreateHotkeys()
 	LoadHotkeyPair(pauseHotkeys, "OBSBasic.PauseRecording",
 		       "OBSBasic.UnpauseRecording");
 
+	splitFileHotkey = obs_hotkey_register_frontend(
+		"OBSBasic.SplitFile", Str("Basic.Main.SplitFile"),
+		[](void *, obs_hotkey_id, obs_hotkey_t *, bool pressed) {
+			if (pressed)
+				obs_frontend_recording_split_file();
+		},
+		this);
+	LoadHotkey(splitFileHotkey, "OBSBasic.SplitFile");
+
 	replayBufHotkeys = obs_hotkey_pair_register_frontend(
 		"OBSBasic.StartReplayBuffer",
 		Str("Basic.Main.StartReplayBuffer"),

UI/window-basic-main.hpp

@@ -439,7 +439,7 @@ private:
 	obs_hotkey_pair_id streamingHotkeys, recordingHotkeys, pauseHotkeys,
 		replayBufHotkeys, vcamHotkeys, togglePreviewHotkeys,
 		contextBarHotkeys;
-	obs_hotkey_id forceStreamingStopHotkey;
+	obs_hotkey_id forceStreamingStopHotkey, splitFileHotkey;
 
 	void InitDefaultTransitions();
 	void InitTransition(obs_source_t *transition);