chore(plugins): bump ani-skills version to 0.4.0

[anistark]

Update Plugin

Plugin name: ani-skills

Update type

• Version bump
• Description change
• Category change
• Tags / type change
• Source change (e.g. moved repo, switched to npm)
• Author/metadata update
• Other

Checklist

Uncheck any item that does not apply or has not been completed.

• I have read and understood the contributing guidelines
• I am the original author or maintainer of this plugin
• Only my plugin's file in plugins/ is modified (do not edit marketplace.json)
• Tested locally with /plugin marketplace add and /plugin install

Reason for update

Switching to other? If you're changing the category or a type tag to other, please explain why none of the existing options fit.

[github-actions]

Plugin Validation ✅

Check	Status
Duplicate check	✅ success
Schema validation	✅ success
Marketplace build	✅ success

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