adding initial models but mostly boilerplate for the entire implementation

packages/common/models/usersConverations.ts

@@ -0,0 +1,31 @@
+import { v4 as uuid } from "uuid";
+import { Timestamp } from "firebase/firestore";
+
+export default class UserConversation {
+  id: string = uuid();
+
+  userId: string;
+  conversationId: string;
+  state: UserConversationState;
+
+  createdDate: Timestamp = Timestamp.now();
+  lastUpdatedDate?: Timestamp;
+
+  constructor(
+    _userId: string,
+    _conversationId: string,
+    _state: UserConversationState
+  ) {
+    this.userId = _userId;
+    this.conversationId = _conversationId;
+    this.state = _state;
+  }
+}
+
+export enum UserConversationState {
+  default = "default",
+  priority = "priority",
+  later = "later",
+  done = "done",
+  // blocked = "blocked"
+}