feat(types): add typing to AppMentionEvent files prop (#2449)

Author: misscoded

packages/types/src/events/app.ts

@@ -133,8 +133,63 @@ export interface AppMentionEvent {
   text: string;
   attachments?: MessageAttachment[];
   blocks?: (KnownBlock | Block)[];
-  // TODO: Add more properties once the types library has a file object definition
-  files?: { id: string }[];
+  // TODO: Create and extend a file object definition
+  files?: {
+    id: string;
+    created: number;
+    timestamp: number;
+    name: string;
+    title: string;
+    mimetype: string;
+    filetype: string;
+    pretty_type: string;
+    user: string;
+    user_team: string;
+    editable: boolean;
+    size: number;
+    mode: string;
+    is_external: boolean;
+    external_type: string;
+    is_public: boolean;
+    public_url_shared: boolean;
+    display_as_bot: boolean;
+    username: string;
+    url_private: string;
+    url_private_download: string;
+    media_display_type: string;
+    thumb_pdf?: string;
+    thumb_pdf_w?: number;
+    thumb_pdf_h?: number;
+    thumb_64?: string;
+    thumb_80?: string;
+    thumb_360?: string;
+    thumb_360_w?: number;
+    thumb_360_h?: number;
+    thumb_480?: string;
+    thumb_480_w?: number;
+    thumb_480_h?: number;
+    thumb_160?: string;
+    thumb_720?: string;
+    thumb_720_w?: number;
+    thumb_720_h?: number;
+    thumb_800?: string;
+    thumb_800_w?: number;
+    thumb_800_h?: number;
+    thumb_960?: string;
+    thumb_960_w?: number;
+    thumb_960_h?: number;
+    thumb_1024?: string;
+    thumb_1024_w?: number;
+    thumb_1024_h?: number;
+    original_w?: number;
+    original_h?: number;
+    thumb_tiny?: string;
+    permalink: string;
+    permalink_public: string;
+    is_starred: boolean;
+    has_rich_preview: boolean;
+    file_access: string;
+  }[];
   upload?: boolean;
   display_as_bot?: boolean;
   edited?: {