docs: add creative and security to skill proposal categories

[UroojFatima-052]

Closes #277

Syncs the New Skill Proposal template with the current registry by adding the two missing categories (creative, security) that already have shipped skills.

Changes

.github/ISSUE_TEMPLATE/01_skill_proposal.yml

• Added creative and security to the category dropdown, sorted alphabetically alongside the existing options
• Kept "Propose new category (describe below)" as the last option
• Added a one-line note in the intro linking to the Skill categories table in CONTRIBUTING.md, so future drift is easier to spot

.github/labels.json

• Added a creative label matching the format/style of the existing security label

Notes

• Left CONTRIBUTING.md and the skill folder layout alone since they were marked out of scope
• Did not run scripts/sync_labels.py locally per your earlier note, CI will sync the new label on merge

Let me know if any adjustments are needed!

[rosspeili]

Thanks @UroojFatima-052, this LGTM.

Not blocking, what would be nice ot have in the same PR: a one-line note in CONTRIBUTING to update 01_skill_proposal.yml when adding new top-level skills/ categories (#277 item 5).

Welcome aboard, and thanks for picking up a good first issue. <3

[UroojFatima-052]

Thanks so much for the review and the welcome !!

And for CONTRIBUTING.md I am happy to open a follow-up PR if you'd like to.

[rosspeili]

Hey @UroojFatima-052, that is covered in the maintainer chore, but thanks for offering. <3

Feel free to browse more good first issues that are up for grabs on Skillware, or explore some of our other repos that have good first issues and help wanted. Good luck!