feat(FN-3883): fix dependency-graph plugin exports and add CLI bundle entry

Fixed the `@fusion-plugin/dependency-graph` plugin's exports and build entry points so it bundles correctly with the CLI, added test coverage for plugin enable success and error-state toasts, and included the plugin's dist in the CLI bundle via tsup config.

Fusion-Task-Id: FN-3883

plugins/fusion-plugin-dependency-graph/package.json

@@ -6,16 +6,16 @@
   "private": true,
   "exports": {
     ".": {
-      "types": "./src/index.ts",
-      "import": "./src/index.ts"
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
     },
     "./dashboard-view": {
-      "types": "./src/dashboard-view.tsx",
-      "import": "./src/dashboard-view.tsx"
+      "types": "./dist/dashboard-view.d.ts",
+      "import": "./dist/dashboard-view.js"
     }
   },
   "scripts": {
-    "build": "tsc",
+    "build": "tsc && cp src/*.css dist/ && mkdir -p dist/styles && cp src/styles/*.css dist/styles/",
     "test": "vitest run --silent=passed-only --reporter=dot"
   },
   "dependencies": {