added season types and changed new season to be a modal

internal/db/migrations/20260210182212_add_leagues.go

@@ -55,13 +55,7 @@ func init() {
 			if err != nil {
 				return err
 			}
-
-			// Remove slap_version column from seasons table
-			_, err = conn.NewDropColumn().
-				Model((*db.Season)(nil)).
-				ColumnExpr("slap_version").
-				Exec(ctx)
-			return err
+			return nil
 		},
 	)
 }