feat(cmdline): improve rich output and add mise tasks

- Add box-drawing characters for nicer header
- Add response formatting with success/error indicators
- Add mise tasks: cmd (interactive) and cmd-stats (monitoring)

mise.toml

@@ -25,6 +25,13 @@ run = "uv run mainline.py"
 run-poetry = "uv run mainline.py --poetry"
 run-firehose = "uv run mainline.py --firehose"
 
+# =====================
+# Command & Control
+# =====================
+
+cmd = "uv run cmdline.py"
+cmd-stats = "uv run cmdline.py -w /effects stats"
+
 # =====================
 # Environment
 # =====================