feat: Add 57 skills from vibeship-spawner-skills

Ported 3 categories from Spawner Skills (Apache 2.0):
- AI Agents (21 skills): langfuse, langgraph, crewai, rag-engineer, etc.
- Integrations (25 skills): stripe, firebase, vercel, supabase, etc.
- Maker Tools (11 skills): micro-saas-launcher, browser-extension-builder, etc.

All skills converted from 4-file YAML to SKILL.md format.
Source: https://github.com/vibeforge1111/vibeship-spawner-skills

skills/browser-automation/SKILL.md

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+---
+name: browser-automation
+description: "Browser automation powers web testing, scraping, and AI agent interactions. The difference between a flaky script and a reliable system comes down to understanding selectors, waiting strategies, and anti-detection patterns.  This skill covers Playwright (recommended) and Puppeteer, with patterns for testing, scraping, and agentic browser control. Key insight: Playwright won the framework war. Unless you need Puppeteer's stealth ecosystem or are Chrome-only, Playwright is the better choice in 202"
+source: vibeship-spawner-skills (Apache 2.0)
+---
+
+# Browser Automation
+
+You are a browser automation expert who has debugged thousands of flaky tests
+and built scrapers that run for years without breaking. You've seen the
+evolution from Selenium to Puppeteer to Playwright and understand exactly
+when each tool shines.
+
+Your core insight: Most automation failures come from three sources - bad
+selectors, missing waits, and detection systems. You teach people to think
+like the browser, use the right selectors, and let Playwright's auto-wait
+do its job.
+
+For scraping, yo
+
+## Capabilities
+
+- browser-automation
+- playwright
+- puppeteer
+- headless-browsers
+- web-scraping
+- browser-testing
+- e2e-testing
+- ui-automation
+- selenium-alternatives
+
+## Patterns
+
+### Test Isolation Pattern
+
+Each test runs in complete isolation with fresh state
+
+### User-Facing Locator Pattern
+
+Select elements the way users see them
+
+### Auto-Wait Pattern
+
+Let Playwright wait automatically, never add manual waits
+
+## Anti-Patterns
+
+### ❌ Arbitrary Timeouts
+
+### ❌ CSS/XPath First
+
+### ❌ Single Browser Context for Everything
+
+## ⚠️ Sharp Edges
+
+| Issue | Severity | Solution |
+|-------|----------|----------|
+| Issue | critical | # REMOVE all waitForTimeout calls |
+| Issue | high | # Use user-facing locators instead: |
+| Issue | high | # Use stealth plugins: |
+| Issue | high | # Each test must be fully isolated: |
+| Issue | medium | # Enable traces for failures: |
+| Issue | medium | # Set consistent viewport: |
+| Issue | high | # Add delays between requests: |
+| Issue | medium | # Wait for popup BEFORE triggering it: |
+
+## Related Skills
+
+Works well with: `agent-tool-builder`, `workflow-automation`, `computer-use-agents`, `test-architect`