added license information screeen and resources

resources/asset_info.gd

@@ -0,0 +1,27 @@
+extends Resource
+class_name AssetInfo
+
+enum AssetType {
+	MUSIC,
+	SFX,
+	THREEDIMENSIONAL,
+	TEXTURES,
+	FONTS
+}
+
+enum LicenseType {
+	CC0,
+	CCBY,
+	CCBYSA,
+	MIT,
+	GPL2,
+	GPL3,
+	OFL,
+	NONE
+}
+
+@export var asset_type: AssetType = AssetType.MUSIC
+@export var license_type: LicenseType = LicenseType.MIT
+@export var asset_name: String = ""
+@export var author_name: String = ""
+@export var link: String = "https://example.com"