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/neon-postgres/SKILL.md

@@ -0,0 +1,56 @@
+---
+name: neon-postgres
+description: "Expert patterns for Neon serverless Postgres, branching, connection pooling, and Prisma/Drizzle integration Use when: neon database, serverless postgres, database branching, neon postgres, postgres serverless."
+source: vibeship-spawner-skills (Apache 2.0)
+---
+
+# Neon Postgres
+
+## Patterns
+
+### Prisma with Neon Connection
+
+Configure Prisma for Neon with connection pooling.
+
+Use two connection strings:
+- DATABASE_URL: Pooled connection for Prisma Client
+- DIRECT_URL: Direct connection for Prisma Migrate
+
+The pooled connection uses PgBouncer for up to 10K connections.
+Direct connection required for migrations (DDL operations).
+
+
+### Drizzle with Neon Serverless Driver
+
+Use Drizzle ORM with Neon's serverless HTTP driver for
+edge/serverless environments.
+
+Two driver options:
+- neon-http: Single queries over HTTP (fastest for one-off queries)
+- neon-serverless: WebSocket for transactions and sessions
+
+
+### Connection Pooling with PgBouncer
+
+Neon provides built-in connection pooling via PgBouncer.
+
+Key limits:
+- Up to 10,000 concurrent connections to pooler
+- Connections still consume underlying Postgres connections
+- 7 connections reserved for Neon superuser
+
+Use pooled endpoint for application, direct for migrations.
+
+
+## ⚠️ Sharp Edges
+
+| Issue | Severity | Solution |
+|-------|----------|----------|
+| Issue | high | See docs |
+| Issue | high | See docs |
+| Issue | high | See docs |
+| Issue | medium | See docs |
+| Issue | medium | See docs |
+| Issue | low | See docs |
+| Issue | medium | See docs |
+| Issue | high | See docs |