fix(plugins): re-export probe symbols + declare plugin deps in dashboard

- Hermes / OpenClaw plugin index.ts now re-export `probeHermesBinary` /
  `probeOpenClawBinary` and their status types so the dashboard's
  `runtime-provider-probes.ts` façade can import them via the public
  package entry instead of deep paths.
- Dashboard `package.json` adds `@fusion-plugin-examples/hermes-runtime`,
  `…/openclaw-runtime`, `…/paperclip-runtime` as workspace deps so
  pnpm symlinks them into `packages/dashboard/node_modules/`. Without
  these, the new probe imports failed with "Cannot find module" during
  `pnpm typecheck`.

This clears 6 of the 9 outstanding typecheck errors. The remaining 3 are
in the in-flight Hermes plugin rewrite (runtime-adapter still imports
from a deleted `./pi-module.js`; the new `index.ts` calls a factory
with the wrong arg type) and should be resolved by the same change set
that landed the rewrite.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/plugin-sdk/package.json

@@ -16,10 +16,16 @@
   "exports": {
     ".": {
       "types": "./src/index.ts",
-      "import": "./src/index.ts"
+      "source": "./src/index.ts",
+      "import": "./dist/index.js"
     }
   },
+  "files": [
+    "dist",
+    "README.md"
+  ],
   "scripts": {
+    "build": "tsc",
     "typecheck": "tsc --noEmit --skipLibCheck",
     "test": "vitest run --silent=passed-only --reporter=dot"
   },