feat: implement initial structure for activities, analytics, auth, contacts, deals, organizations, tasks, and users APIs with placeholder endpoints

app/api/v1/contacts/models.py

@@ -0,0 +1,10 @@
+"""Contact API schemas."""
+from __future__ import annotations
+
+from pydantic import BaseModel, EmailStr
+
+
+class ContactCreatePayload(BaseModel):
+    name: str
+    email: EmailStr | None = None
+    phone: str | None = None