Upgrade to Godot 4

This is the start of a major rewrite of the game, using varies add-ons whenever possible instead of reinventing the wheel. Not that it wasn't a good learning experience, but, yeah, glad Godot 4 is finally here.

addons/fontawesome/FontAwesome.gd

@@ -0,0 +1,44 @@
+@tool
+extends Label
+
+@export_category("FontAwesome")
+@export_range(1, 16384) var icon_size: int = 16: set = set_icon_size
+@export_enum("solid", "regular", "brands") var icon_type: String = "solid": set = set_icon_type
+@export var icon_name: String = "circle-question": set = set_icon_name
+
+const icon_fonts: Dictionary = {
+	"solid": "res://addons/fontawesome/fonts/fa-solid-900.woff2",
+	"regular": "res://addons/fontawesome/fonts/fa-regular-400.woff2",
+	"brands": "res://addons/fontawesome/fonts/fa-brands-400.woff2"
+}
+
+const cheatsheet: Dictionary = preload("res://addons/fontawesome/All.gd").all
+
+func _init():
+	horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	vertical_alignment = VERTICAL_ALIGNMENT_CENTER
+	# disable some things, this is icon not text
+	auto_translate = false
+	localize_numeral_system = false
+
+	set_icon_type(icon_type)
+	set_icon_size(icon_size)
+	set_icon_name(icon_name)
+
+func set_icon_size(new_size: int):
+	icon_size = clamp(new_size, 1, 16384)
+	add_theme_font_size_override("font_size", icon_size)
+	size = Vector2(icon_size, icon_size)
+
+func set_icon_type(new_type: String):
+	icon_type = new_type
+	match icon_type:
+		"solid", "regular", "brands":
+			add_theme_font_override("font", load(icon_fonts[icon_type]))
+
+func set_icon_name(new_name: String):
+	icon_name = new_name
+	var iconcode = ""
+	if icon_name in cheatsheet[icon_type]:
+		iconcode = cheatsheet[icon_type][icon_name]
+		set_text(iconcode)