feat: shorten default configuration flag to --default-config

Sources/CLI/PlayerCommand.swift

@@ -10,7 +10,7 @@ enum PlayerCommand {
            terebi [--new-instance] [--no-config] --url YOUTUBE_URL
            terebi [--new-instance] [--no-config] -- FILE
            terebi --help
-           terebi --print-default-config
+           terebi --default-config
 
     Open one local media file or YouTube video and start playback, resuming saved
     video progress when available. With no arguments, open or activate the player.
@@ -21,7 +21,7 @@ enum PlayerCommand {
       --url URL      Open a YouTube video URL.
       --             Treat the following argument as a filename, even with a leading '-'.
       -h, --help     Show this help without launching the player.
-      --print-default-config Print the complete built-in TOML without launching.
+      --default-config Print the complete built-in TOML without launching.
 
     Reuses the running player unless --new-instance is supplied before the media
     arguments. The command exits once macOS accepts the launch; playback and
@@ -44,7 +44,7 @@ enum PlayerCommand {
         }
         if inputs.isEmpty { return .launch(nil, newInstance: newInstance, noConfig: noConfig) }
         if inputs == ["--help"] || inputs == ["-h"] { return .help }
-        if inputs == ["--print-default-config"] { return .printDefaultConfig }
+        if inputs == ["--default-config"] { return .printDefaultConfig }
         if inputs.first == "--url" {
             guard inputs.count == 2 else { throw ArgumentError("--url requires exactly one YouTube URL.") }
             return .launch(try YouTubeResolver.validateURL(inputs[1]), newInstance: newInstance, noConfig: noConfig)