[FEATURE] Differentiate system vs user-provided skill/command highlight colors

Problem

All skills and commands (both system-provided and user-provided) are highlighted with the same faint purple color in the CLI output. This makes it impossible to visually distinguish between built-in system skills/commands and user-provided ones (including those from plugins).

When you have many skills loaded from plugins alongside the built-in ones, there's no visual cue to tell them apart at a glance.

Proposed solution

Use two distinct highlight colors for skills and commands:

• Color A (e.g., current faint purple) for system skills/commands (built-in to Claude Code)
• Color B (e.g., a different hue like teal, green, or orange) for user-provided skills/commands (from plugins or user configuration)

Plugins should be treated as user-provided. This means only two highlight color categories are needed: system and user.

Alternatives considered

None — the current single-color approach doesn't provide any way to distinguish origin.

Priority

Medium

Category

Interactive mode (TUI)