Automatically detect Custom UI dependencies by analyzing the Forge app manifest.yml

[tbinna]

I am wondering if we may be able to detect Custom UI dependencies of a Forge app automatically by analyzing the Forge manifest.yml app and tech Nx about those dependencies similar to the way it is done in this talk: https://youtu.be/LKQjUVJ7EvY?t=1181

If we can do this, we may be able to simplify the project setup. Users would not have to declare implicit dependencies on Custom UI projects anymore.

Docs: https://nx.dev/recipes/advanced-plugins/project-graph-plugins

[tbinna]

This has been implemented in #43