Sort the scripts and scenes into folders

main/ holds the main window and top bar, quiz/ the quiz and its parts,
player/ the music player, popups/ every popup and what they share, data/ the
songs, players, playlist and settings, server/ the MusicServer client,
common/ the list row and GameLog, and themes/ the themes and style boxes.

data/settings.gd

@@ -0,0 +1,38 @@
+extends Node
+## The game settings and the players, shared by the whole game.
+##
+## Registered as the [code]Settings[/code] autoload.
+
+const MAX_NUMBER_OF_PLAYERS: int = 7
+
+var default_path: String = "https://music.sanplex.xyz"
+var selected_server: int = 0
+var is_local: bool = false
+var is_debug: bool = false
+var stop_after_current: bool = true
+var auto_repeat_song: bool = true
+var hide_next_track: bool = true
+var add_to_stats: bool = true
+var use_low_played_mode: bool = false
+var winning_score: int = 20
+var fullscreen: bool = false
+var play_local: bool = false
+var inspiration_list_speed: int = 1
+var hide_for_seconds: float = 5.0
+var hide_beginning: bool = false
+var hide_length: bool = false
+var hide_ticks: bool = false
+var player_array: Array[PlayerObject]
+var edit_players: bool = false
+var currently_syncing: bool = false
+var character_select_open: bool = false
+
+## The game version, set in Project Settings > Application > Config > Version.
+## Releases are made from it, see RELEASING.md.
+var version: String = ProjectSettings.get_setting("application/config/version", "")
+
+
+func delete_children(node: Node) -> void:
+	for n: Node in node.get_children():
+		node.remove_child(n)
+		n.queue_free()