feat(home): add new frontend system support

Migrates home plugin to support the new frontend system architecture by
introducing extension blueprints for composable homepage functionality.
Key changes:
- Add CustomHomepageWidgetBlueprint for creating installable homepage widgets
- Add CustomHomepageBlueprint for composing pages from widget extensions
- Introduce titleExtensionDataRef for NFS title handling
This attempts to bring  the home plugin up to par with other core plugins that have migrated
to the new frontend system
Signed-off-by: Adam Kunicki <kunickiaj@gmail.com>

plugins/home/package.json

@@ -83,6 +83,8 @@
   "devDependencies": {
     "@backstage/cli": "workspace:^",
     "@backstage/dev-utils": "workspace:^",
+    "@backstage/frontend-defaults": "workspace:^",
+    "@backstage/plugin-catalog": "workspace:^",
     "@backstage/test-utils": "workspace:^",
     "@testing-library/dom": "^10.0.0",
     "@testing-library/jest-dom": "^6.0.0",