Feature: Add "Authentication Method" to allow existing users to sign in with LDAP (#2143)

* adds authentication method for users

* fix db migration with postgres

* tests for auth method

* update migration ids

* hide auth method on user creation form

* (docs): Added documentation for the new authentication method

* update migration

* add  to auto-form instead of having hidden fields

tests/utils/fixture_schemas.py

@@ -2,6 +2,8 @@ from dataclasses import dataclass
 from typing import Any
 from uuid import UUID
 
+from mealie.db.models.users.users import AuthMethod
+
 
 @dataclass
 class TestUser:
@@ -11,6 +13,7 @@ class TestUser:
     password: str
     _group_id: UUID
     token: Any
+    auth_method = AuthMethod.MEALIE
 
     @property
     def group_id(self) -> str: