fix: upgrade dependencies for angular v18 compatibility

[jpsullivan]

This PR includes updates to the project that were performed after running nx migrate latest which brought all of the Angular dependencies to the latest and greatest.

Notably this also introduces support for those who are already using Angular 18 in their own projects, as the current version fails to install due to being capped at v17.

This does not bump the version in any way as I figured it'd be best to let the push-based team take care of that.

I tested the application by running npm run serve and can confirm that the library and demo app work as expected.