feat: enable C&C, compact mise tasks, update docs

- Cherry-pick C&C support (ntfy poller for commands, response handling)
- Compact mise.toml with native dependency chaining
- Update AGENTS.md with C&C documentation
- Update README.md with display modes and C&C usage

cmdline.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 """
 Command-line utility for interacting with mainline via ntfy.
 
@@ -20,6 +21,11 @@ C&C works like a serial port:
     3. Cmdline polls for response
 """
 
+import os
+
+os.environ["FORCE_COLOR"] = "1"
+os.environ["TERM"] = "xterm-256color"
+
 import argparse
 import json
 import sys