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/code-groups.md

@@ -0,0 +1,64 @@
+---
+name: code-groups
+description: Group multiple code blocks with tabs and automatic icons
+---
+
+# Code Groups
+
+Group multiple code blocks with tabs and automatic icons.
+
+## Requirements
+
+Enable MDC syntax in headmatter:
+
+```md
+---
+mdc: true
+---
+```
+
+## Syntax
+
+````md
+::code-group
+
+```sh [npm]
+npm i @slidev/cli
+```
+
+```sh [yarn]
+yarn add @slidev/cli
+```
+
+```sh [pnpm]
+pnpm add @slidev/cli
+```
+
+::
+````
+
+## Title Icon Matching
+
+Icons auto-match by title name. Install `@iconify-json/vscode-icons` for built-in icons.
+
+Supported: npm, yarn, pnpm, bun, deno, vue, react, typescript, javascript, and many more.
+
+## Custom Icons
+
+Use `~icon~` syntax in title:
+
+````md
+```js [npm ~i-uil:github~]
+console.log('Hello!')
+```
+````
+
+Requires:
+1. Install icon collection: `pnpm add @iconify-json/uil`
+2. Add to safelist in `uno.config.ts`:
+
+```ts
+export default defineConfig({
+  safelist: ['i-uil:github']
+})
+```