feat: migrate agentmemory to agentcache namespace, endpoints, and tools

feat: upscale & UX overhaul — blueprint split, debounce, tests, viewer enhancements, DX improvements

Implement memory_antigravity_sync_all master sync tool

Expose missing MCP tools for Pinned Slots, Actions, and crystallization (Crystals)

Allow dynamic AGENTMEMORY_URL and AGENTMEMORY_SECRET in stdio MCP wrapper

Initialize Hugging Face Space deployment for AgentMemory Python (clean without assets)