Add new sparkles icon

[lukasoppermann]

This icon was request by @dthoma1.

Fixes https://github.com/github/primer/issues/4430

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🦋 Changeset detected

Latest commit: d2ddaae

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/octicons	Minor

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[colebemis]

Should we call this sparkles-fill? That leaves the option to have an outline version in the future and is consistent with the existing sparkle-fill icon: https://primer.style/foundations/icons/sparkle-fill-16

[dthoma1]

This icon fits our needs for the docs ai assistant project. ✨

[lukasoppermann]

@colebemis is there a naming convention for icons somewhere?

Also: Updated to sparkles-fill

[colebemis]

@colebemis is there a naming convention for icons somewhere?

I don't think so 😞

[tallys]

@colebemis you are a gem and an eternal champion of Octicons, thank you for reviewing!
@lukasoppermann thanks so much for pushing this through to support @dthoma1 !!!