refactor(ts): complete legacy host removal — drop fastify/commander/zod, delete MCP SDK server, remove ManagedRuntime facades

Finishes the remaining EFFECT_NATIVE_REWRITE_PLAN stages in one verified slice:
- fastify, @fastify/websocket, commander, zod removed from all package manifests
- legacy @modelcontextprotocol/sdk stdio server deleted; effect/unstable/ai McpServer is canonical
- no ManagedRuntime or Effect.runPromise program facades remain in production source
- gateway server/rpc-contract and client rpc/socket moved onto Effect v4 native http/rpc/socket layers

Gates (force-run, no cache): check:tsgo, build, test (96 tests / 11 tasks) all green.
Native-class inventory: zero blocking production classes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ts/packages/cli/package.json

@@ -12,16 +12,10 @@
     "test": "bunx --bun vitest run --passWithNoTests --exclude=dist/**"
   },
   "dependencies": {
-    "@effect/ai-anthropic": "4.0.0-beta.78",
-    "@effect/ai-openai": "4.0.0-beta.78",
-    "@effect/ai-openrouter": "4.0.0-beta.78",
-    "@effect/atom-react": "4.0.0-beta.78",
-    "@effect/openapi-generator": "4.0.0-beta.78",
-    "@effect/opentelemetry": "4.0.0-beta.78",
-    "@effect/platform-browser": "4.0.0-beta.78",
     "@effect/platform-bun": "4.0.0-beta.78",
     "@trustgraph/base": "workspace:*",
     "@trustgraph/client": "workspace:*",
+    "effect": "4.0.0-beta.78",
     "ws": "^8.18.0"
   },
   "devDependencies": {