ClipCommand should avoid overwriting clips

[thelabcat]

When saving a clip, the two clip commands should increment a suffix until the file does not show up in a glob of the output folder. this should happen before the notif message that the clip was saved so it displays the incremented name.

[thelabcat]

if filename in glob.glob("*", root_dir = self.clip_save_path):

[thelabcat]

increment = 0
safe_filename = filename
while safe_filename in glob.glob("*", root_dir = self.clip_save_path):
    increment += 1
    safe_filename = filename + f"({increment})"