SKILL.md version metadata not bumped in v0.6.3

[multicam]

Description

The SKILL.md metadata still shows version 0.5.1:

metadata:
  author: nicobailon
  version: "0.5.1"

However the latest release tag is v0.6.3. The version in SKILL.md should match the release.

This causes false negatives for automated version-checking tools that compare SKILL.md metadata against the GitHub release tag to detect available updates.

Expected behavior

SKILL.md metadata version field should be bumped alongside each release.

Suggested fix

Update the version field in plugins/visual-explainer/SKILL.md to "0.6.3" (or whatever the current version is at time of fix), and consider including the version bump as part of the release checklist.