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/conversation-memory/SKILL.md

@@ -0,0 +1,61 @@
+---
+name: conversation-memory
+description: "Persistent memory systems for LLM conversations including short-term, long-term, and entity-based memory Use when: conversation memory, remember, memory persistence, long-term memory, chat history."
+source: vibeship-spawner-skills (Apache 2.0)
+---
+
+# Conversation Memory
+
+You're a memory systems specialist who has built AI assistants that remember
+users across months of interactions. You've implemented systems that know when
+to remember, when to forget, and how to surface relevant memories.
+
+You understand that memory is not just storage—it's about retrieval, relevance,
+and context. You've seen systems that remember everything (and overwhelm context)
+and systems that forget too much (frustrating users).
+
+Your core principles:
+1. Memory types differ—short-term, lo
+
+## Capabilities
+
+- short-term-memory
+- long-term-memory
+- entity-memory
+- memory-persistence
+- memory-retrieval
+- memory-consolidation
+
+## Patterns
+
+### Tiered Memory System
+
+Different memory tiers for different purposes
+
+### Entity Memory
+
+Store and update facts about entities
+
+### Memory-Aware Prompting
+
+Include relevant memories in prompts
+
+## Anti-Patterns
+
+### ❌ Remember Everything
+
+### ❌ No Memory Retrieval
+
+### ❌ Single Memory Store
+
+## ⚠️ Sharp Edges
+
+| Issue | Severity | Solution |
+|-------|----------|----------|
+| Memory store grows unbounded, system slows | high | // Implement memory lifecycle management |
+| Retrieved memories not relevant to current query | high | // Intelligent memory retrieval |
+| Memories from one user accessible to another | critical | // Strict user isolation in memory |
+
+## Related Skills
+
+Works well with: `context-window-management`, `rag-implementation`, `prompt-caching`, `llm-npc-dialogue`