feat: Add complete Agentic Compaction & Pipeline System

- Context Compaction System with token counting and summarization
- Deterministic State Machine for flow control (no LLM decisions)
- Parallel Execution Engine (up to 12 concurrent sessions)
- Event-Driven Coordination via Event Bus
- Agent Workspace Isolation (tools, memory, identity, files)
- YAML Workflow Integration (OpenClaw/Lobster compatible)
- Claude Code integration layer
- Complete demo UI with real-time visualization
- Comprehensive documentation and README

Components:
- agent-system/: Context management, token counting, subagent spawning
- pipeline-system/: State machine, parallel executor, event bus, workflows
- skills/: AI capabilities (LLM, ASR, TTS, VLM, image generation, etc.)
- src/app/: Next.js demo application

Total: ~100KB of production-ready TypeScript code

skills/podcast-generate/test_data/segments.jsonl

@@ -0,0 +1,3 @@
+{"idx": 1, "speaker": "host", "name": "主持人", "text": "大家好，欢迎来到今天的播客节目。"}
+{"idx": 2, "speaker": "guest", "name": "嘉宾", "text": "很高兴能参加这次节目。"}
+{"idx": 3, "speaker": "host", "name": "主持人", "text": "今天我们要讨论一个非常有意思的话题。"}