Forms are not eager loaded

[jhawthorn]

We're seeing files inside lib/primer/forms/ being lazily-loaded in a production environment. This is undesirable because it moves what should be boot time costs to users, is less friendly to Copy-on-Write memory and YJIT, and other issues.

https://github.com/primer/view_components/blob/main/lib/primer/view_components/engine.rb#L12-L14

Though also it seems like lib/ should not be an autoload directory at all, as other files are explicitly required. Maybe lib/primer/forms/ should be in app?