Started work on OverlayPlugin

Started work for OverlayPlugin, class to be inherited by all Plugin
Scripts.

lib/scripting/overlay_plugin.gd

@@ -0,0 +1,37 @@
+@abstract
+extends Node
+class_name OverlayPlugin
+
+#region Internal Variables
+var _twitch: TwitcherExtended
+var _obs: NoOBSWS
+#endregion
+
+func _ready() -> void:
+	while not TwitcherExtended.instance:
+		await get_tree().process_frame
+	_twitch = TwitcherExtended.instance
+
+@abstract func run() -> void
+
+#region Internal Functions
+func _get_script_name() -> String:
+	return self.get_script().get_global_name()
+#endregion
+
+func send_notification(message: String) -> void:
+	EventManager.test_notification(message)
+
+func get_setting(name: String, defval: Variant) -> Variant:
+	var script_name := _get_script_name()
+	if not Globals.settings.script_storage.has(script_name):
+		return defval
+	if not Globals.settings.script_storage[script_name].has(name):
+		return defval
+	return Globals.settings.script_storage[script_name][name]
+
+func set_setting(name: String, value: Variant) -> void:
+	var script_name := _get_script_name()
+	if not Globals.settings.script_storage.has(script_name):
+		Globals.settings.script_storage[script_name] = {}
+	Globals.settings.script_storage[script_name][name] = value