完善 README 项目说明

main/pingpang.gdextension.uid

@@ -0,0 +1 @@
+uid://b6i8s2sq8m8lc

main/project.godot

@@ -11,15 +11,10 @@ config_version=5
 [application]
 
 config/name="Pingpang"
+run/main_scene="res://scenes/main.tscn"
 config/features=PackedStringArray("4.6", "Forward Plus")
 config/icon="res://icon.svg"
 
-run/main_scene="res://scenes/main.tscn"
-
 [physics]
 
 common/enable_2d_physics=true
-
-[rendering]
-
-renderer/rendering_method="forward_plus"