feat: Complete fleet — 94 skills across 10+ domains

Pulled ALL skills from 15 source repositories:
- anthropics/skills: 16 (docs, design, MCP, testing)
- obra/superpowers: 14 (TDD, debugging, agents, planning)
- coreyhaines31/marketingskills: 25 (marketing, CRO, SEO, growth)
- better-auth/skills: 5 (auth patterns)
- vercel-labs/agent-skills: 5 (React, design, Vercel)
- antfu/skills: 16 (Vue, Vite, Vitest, pnpm, Turborepo)
- Plus 13 individual skills from various repos

Mosaic Stack is not limited to coding — the Orchestrator and
subagents serve coding, business, design, marketing, writing,
logistics, analysis, and more.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/slidev/references/syntax-block-frontmatter.md

@@ -0,0 +1,39 @@
+---
+name: block-frontmatter
+description: Using YAML code blocks as slide frontmatter for syntax highlighting
+---
+
+# Block Frontmatter
+
+Use a YAML code block as the frontmatter for slides when you need syntax highlighting and formatter support.
+
+## Usage
+
+Instead of traditional frontmatter `---`, use a yaml code block at the start of a slide:
+
+````md
+---
+theme: default
+---
+
+# Slide 1
+
+---
+
+```yaml
+layout: quote
+```
+
+# Slide 2
+
+---
+
+# Slide 3
+````
+
+## Key Points
+
+- Works for per-slide frontmatter only
+- Cannot use for headmatter (first frontmatter of the deck)
+- Provides syntax highlighting in editors
+- Compatible with prettier-plugin-slidev