[BUG] When creating a new skill from RooCode settings, it is possible to create broken one

Problem (one or two sentences)

Try to create a skill, which is having a colon symbol (:) in it's description Example:

---
name: test-skill
description: do something useful. Keywords: useful, skill, foo, bar
---

Such skill will not be displayed in UI

Context (who is affected and when)

Happens when user creates a skill with specially crafted description text

Reproduction steps

1. create a new skill with RooCode UI (scope does not matter)
2. in description field write something with a colon symbol (:)

Expected result

User can see a new skill in settings UI

Actual result

Skill is not visible (even after app restart)

Variations tried (optional)

No response

App Version

3.53.0 (44f6bba2)

API Provider (optional)

None

Model Used (optional)

No response

Roo Code Task Links (optional)

No response

Relevant logs or errors (optional)