add paint by example

lama_cleaner/app/src/event.ts

@@ -1,11 +1,17 @@
 import mitt from 'mitt'
 
 export const EVENT_PROMPT = 'prompt'
+
 export const EVENT_CUSTOM_MASK = 'custom_mask'
 export interface CustomMaskEventData {
   mask: File
 }
 
+export const EVENT_PAINT_BY_EXAMPLE = 'paint_by_example'
+export interface PaintByExampleEventData {
+  image: File
+}
+
 const emitter = mitt()
 
 export default emitter