fix: disable ast-grep tests on darwin (sandbox locale issue)

modules/overlays.nix

@@ -4,6 +4,12 @@
 		(final: prev: {
 				himalaya = inputs.himalaya.packages.${prev.stdenv.hostPlatform.system}.default;
 			})
+		# ast-grep (test_scan_invalid_rule_id fails on darwin in sandbox)
+		(final: prev: {
+				ast-grep = prev.ast-grep.overrideAttrs (old: {
+					doCheck = false;
+				});
+			})
 		# jj-ryu
 		(final: prev: let
 				naersk-lib = prev.callPackage inputs.naersk {};