build(nix/flake): adding the asm_lsp_config config var

flake.nix

@@ -49,6 +49,7 @@
               xxd
               valgrind
               clang-tools
+              asm-lsp
             ]
             ++ (
               if pkgs.stdenv.isLinux then
@@ -63,6 +64,7 @@
           shellHook = ''
               export AS=nasm
               export CC='clang'
+              export ASM_LSP_CONFIG="$(pwd)/asm-lsp.toml"
               printf "\n\033[0;90mASM env loaded for: \033[38;5;220m${system}\033[0m\n"
             '';
         };