[BUG] Skills inside a symlinked container directory are not discovered #1842

Describe the bug
When .roo/skills (or a subdirectory within it) is a symlink to an external directory that contains skill subdirectories rather than a single skill, Roo Code fails to discover the skills inside it. Only directories that directly contain a SKILL.md are recognized, so a symlinked "container" of multiple skills is skipped.

To Reproduce
Have this directory structure:

/shared-repo/skills/                 # actual directory containing multiple skills
/shared-repo/skills/skill-a/SKILL.md
/shared-repo/skills/skill-b/SKILL.md
/project/.roo/skills/skills -> /shared-repo/skills   # symlinked container of skills

Start Roo Code in /project.
Open the skills list / trigger skill discovery.

Expected behavior
skill-a and skill-b are discovered and available.

Screenshots
N/a

Video
N/a

What version of zoo are you running
3.84

Additional context
n/a