Added a pause menu

It was actually not that difficult surprisingly. Adding this was pretty
fun.

project.godot

@@ -32,6 +32,14 @@ window/vsync/vsync_mode=0
 
 project/assembly_name="Berry Dash Godot Remake"
 
+[input]
+
+EscapeKey={
+"deadzone": 0.2,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194305,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
+]
+}
+
 [rendering]
 
 environment/defaults/default_clear_color=Color(0.0627451, 0.0627451, 0.0627451, 1)