[FEATURE] Feature Request: Allow user-defined ordering of skills in the / command menu

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

There is currently no way to control the order in which skills appear in the / slash command menu.
User-created skills are mixed in with built-in skills, making it harder to quickly access custom
workflows.

Current Workaround

Prefixing skill filenames with characters that sort early (e.g. a-my-skill.md) to influence
alphabetical ordering — this is fragile and not intuitive.

Proposed Solution

A mechanism to prioritize or order skills in the menu — for example:

• A priority or order field in skill frontmatter (e.g. order: 1)
• User/personal skills surfaced before project/plugin skills by default
• Or simply: user-created skills pinned to the top of the list

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

When a user has created several custom skills for frequently used workflows, it's friction to scroll
past built-in skills to find them. Surfacing personal skills at the top would improve discoverability
and speed.

Additional Context

_No response_