feat: add display of kanban card attachment image

src/models/attachment.ts

@@ -5,6 +5,8 @@ import type { IUser } from '@/modelTypes/IUser'
 import type { IFile } from '@/modelTypes/IFile'
 import type { IAttachment } from '@/modelTypes/IAttachment'
 
+export const SUPPORTED_IMAGE_SUFFIX = ['.jpg', '.png', '.bmp', '.gif']
+
 export default class AttachmentModel extends AbstractModel<IAttachment> implements IAttachment {
 	id = 0
 	taskId = 0