feat(FN-1111): merge fusion/fn-1111 (auto-resolved)

- docs(FN-1111): complete Step 8 - plugin system documentation
- feat(FN-1111): complete Step 7 - testing and build fixes
- feat(FN-1111): complete Step 6 - export plugin types from core
- feat(FN-1111): complete Step 5 - plugin SDK package
- feat(FN-1111): complete Step 4 - plugin loader with lifecycle management
- feat(FN-1111): complete Step 3 - plugin store with CRUD
- feat(FN-1111): complete Step 2 - add plugins table schema migration
- feat(FN-1111): complete Step 1 - plugin type definitions

packages/plugin-sdk/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "@fusion/plugin-sdk",
+  "version": "0.1.0",
+  "type": "module",
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "import": "./src/index.ts"
+    }
+  },
+  "scripts": {
+    "typecheck": "tsc --noEmit --skipLibCheck",
+    "test": "vitest run"
+  },
+  "devDependencies": {
+    "@types/node": "^25.5.0",
+    "typescript": "^5.7.0",
+    "vitest": "^3.1.0"
+  },
+  "peerDependencies": {
+    "@fusion/core": "workspace:*"
+  },
+  "engines": {
+    "node": ">=22.5.0"
+  },
+  "private": true
+}