added burger menu with admin page and user invitation link generation

src/baby_monitor/models/auth.py

@@ -17,3 +17,20 @@ class LoginResponse(BaseModel):
     username: str
     access_token: str
     token_type: str = "bearer"
+
+
+class RegisterRequest(BaseModel):
+    """Request model for user registration."""
+
+    username: str
+    password: str
+    invitation_token: str
+
+
+class RegisterResponse(BaseModel):
+    """Response model for successful registration."""
+
+    message: str
+    username: str
+    access_token: str
+    token_type: str = "bearer"