style(flake): adding color to flake message

flake.nix

@@ -16,11 +16,21 @@
 					buildInputs = with pkgs; [
 						clang
 						clang-tools
-					];
+					] ++ (
+						if pkgs.stdenv.isLinux then [
+							valgrind
+						] else []
+					);
 					
 					shellHook = ''
+						export DIRENV_LOG_FORMAT=""
+						export NIX_SHOW_STATS=0
+						export NIX_HIDE_STATS=1
 						export CXX=clang++
 						export CC=clang
+						export CFLAGS="-std=c89 -Wall -Werror -Wextra"
+						export CXXFLAGS="-std=cpp98 -Wall -Werror -Wextra"
+						printf "\n\033[0;90mCPP env loaded for: \033[38;5;220m${system}\033[0m\n"
 					'';
 					};
 				}