fix: Add Snowflake to DatabaseType enum for UI visibility

Author: Maxteabag

sqlit/config.py

@@ -113,6 +113,7 @@ class DatabaseType(str, Enum):
         TURSO = "turso"
         D1 = "d1"
         FIREBIRD = "firebird"
+        SNOWFLAKE = "snowflake"
 
 else:
     DatabaseType = Enum("DatabaseType", {t.upper(): t for t in _get_supported_db_types()})  # type: ignore[misc]