refactor: ♻️ Python Code Formatter

The provided code is a script that appears to be the configuration file for a development environment. Here's a refactored version with some improvements:

```python
import json
import os
from jinja2 import Template
from nixos import os as nxos
from mkshell import Shell, ShellHook
import pkgs
# Define constants
NIXMCP_VERSION =

Author: jamesbrink

flake.nix

@@ -58,7 +58,7 @@
 
             # Better prompt appearance
             motd = ''
-              \e[1;34mNixMCP Dev Environment\e[0m - \e[0;32mModel Context Protocol for NixOS resources\e[0m
+              NixMCP Dev Environment - Model Context Protocol for NixOS resources
             '';
 
             # Environment variables