Add creator studio pack scaffold

prompts/brand-kit.yml

@@ -0,0 +1,13 @@
+---
+title: Brand Kit Narrative
+description: Condense a brand story, tone, and visual system into a shareable doc.
+model: gpt-4o
+tags: [branding, writing]
+steps:
+  - text: "Summarize mission, values, and target audience in under 120 words"
+  - text: "List a palette of five colors with hex values and usage guidance"
+  - text: "Propose a typography stack (display, body, mono) with pairing notes"
+  - text: "Draft a 6-point voice and tone guide with do/don't bullets"
+  - text: "Add a mermaid graph showing brand assets flowing into social, web, print"
+notes: |
+  Keep copy tight but not dry. Include example headlines and a fallback palette for dark mode.