* Plugins: add card extension to nav-landing-page
* feat(nav-landing-page): update card extension to include category and onClick support
* feat(NavLandingPage): add setPluginLinksHook to test setup
* feat(NavLandingPageCard): refactor className handling using cx for better style management
* feat(NavLandingPage): update card extension targets to use plural form for consistency
* feat(NavLandingPage): add warning for mutually exclusive extension points