feat(bubbles): ✨ Add image bubble

packages/models/src/typebot/steps/bubble.ts

@@ -1,12 +1,28 @@
 import { StepBase } from '.'
 
-export type BubbleStep = TextStep
+export type BubbleStep = TextBubbleStep | ImageBubbleStep
 
 export enum BubbleStepType {
   TEXT = 'text',
+  IMAGE = 'image',
 }
 
-export type TextStep = StepBase & {
+export type TextBubbleStep = StepBase & {
   type: BubbleStepType.TEXT
-  content: { html: string; richText: unknown[]; plainText: string }
+  content: TextBubbleContent
+}
+
+export type ImageBubbleStep = StepBase & {
+  type: BubbleStepType.IMAGE
+  content?: ImageBubbleContent
+}
+
+export type TextBubbleContent = {
+  html: string
+  richText: unknown[]
+  plainText: string
+}
+
+export type ImageBubbleContent = {
+  url?: string
 }