feat(agentswarm): M1+M3 — embeddable swarm runtime wrapping deepagents

@logicsrc/agentswarm: a self-hosted, framework-agnostic multi-agent runtime
that each app mounts on its own route (e.g. tronbrowser.dev/swarm).

M1 — core:
- createSwarmHandler(): Web (Request)=>Response handler, CORS + validation
- SwarmRunner: injectable engine interface
- createDeepAgentRunner(): deepagents (createDeepAgent) adapter; deepagents +
  @langchain/langgraph are optional peers loaded via dynamic import so the core
  builds/tests with zero heavy deps
- SwarmError + onRequest gate: seam for x402 metering / auth (402/403)

M3 — rubric self-check (deepagents RubricMiddleware is Python-only, so ported
at the runner layer):
- createRubricRunner(): grades output via an injectable judge and revises until
  it passes or maxIterations; passes through untouched when no rubric
- createLLMJudge(): cheap-model grader (lazy langchain initChatModel)

13/13 vitest pass; tsc clean; examples/server.mjs demo verified.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/agentswarm/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "@logicsrc/agentswarm",
+  "version": "0.1.0",
+  "description": "AgentSwarm: embeddable multi-agent swarm runtime for LogicSRC, wrapping deepagents. Mount it on your own route (e.g. /swarm).",
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "license": "MIT",
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "test": "vitest run src --passWithNoTests",
+    "demo": "node examples/server.mjs"
+  },
+  "peerDependencies": {
+    "@langchain/langgraph": "*",
+    "deepagents": "^1.10.0"
+  },
+  "peerDependenciesMeta": {
+    "@langchain/langgraph": { "optional": true },
+    "deepagents": { "optional": true }
+  },
+  "devDependencies": {
+    "vitest": "^4.0.8"
+  }
+}