feat(FN-2263): merge fusion/fn-2263 (auto-resolved)

- docs(FN-2263): update README with scaffolded scope and deferral documentation
- test(FN-2263): verify hermes runtime plugin build and tests
- feat(FN-2263): implement plugin entrypoint with runtime registration shell
- feat(FN-2263): scaffold Hermes runtime plugin package
- test(FN-2256): add mocks for createResolvedAgentSession in tests
- docs(FN-2256): update architecture docs and add changeset
- fix(FN-2256): fix lint errors and TypeScript issues
- feat(FN-2256): add runtime selection regression tests — Step 4
- feat(FN-2256): route engine session creation through runtime resolver — Step 3
- feat(FN-2256): extend PluginRunner runtime lookup surface — Step 2
- feat(FN-2256): add runtime abstraction and resolver — Step 1

plugins/fusion-plugin-hermes-runtime/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "@fusion-plugin-examples/hermes-runtime",
+  "version": "0.1.0",
+  "type": "module",
+  "description": "Hermes AI runtime plugin for Fusion - provides AI agent execution runtime",
+  "keywords": [
+    "fusion-plugin",
+    "hermes",
+    "runtime",
+    "ai"
+  ],
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "private": true,
+  "scripts": {
+    "build": "tsc",
+    "test": "vitest run --silent=passed-only --reporter=dot"
+  },
+  "dependencies": {
+    "@fusion/plugin-sdk": "workspace:*"
+  },
+  "devDependencies": {
+    "@types/node": "^25.5.2",
+    "vitest": "^3.2.4"
+  }
+}