[CLI]: User-configurable themes and presentation settings

[rosspeili]

Change type

Enhancement

Command or area

skillware (interactive menu)

Install method

Both / unknown

Description

presentation:
  theme: pastel

2–3 built-in themes. Pick via CLI; persist in global config; optional project override. Fallback to pastel.

Acceptance criteria

• Theme from config applied consistently
• Change theme without hand-editing YAML
• Unknown theme → graceful fallback
• cli.md + smoke tests

Steps to reproduce (bugs)

N/A

Environment

N/A