Color-code task/todo items by lifecycle state (in-progress vs completed)

Currently, TodoWrite and Task tool items show status only as text ([pending], [in-progress], [completed]). It would help scanability to color the item's description text based on state:

• In-progress: description turns blue when the task starts.
• Completed: description turns green when the task finishes.
• No description set (e.g. task/tool has no name/label): no color change, leave as-is.

This would apply to the console/CLI rendering of task lists and Task-tool progress, not just the global theme tokens (success/error) which currently apply elsewhere. Would make it easier to track what's running vs done at a glance in long sessions.