Include multiple resources directories

[johnhungerford]

It would be useful to specify multiple directories in viteResources for a couple reasons:

1. For projects like my own that are broken up into multiple sub-projects, it is useful to be able to import common source directories in addition to project-specific ones
2. It allows using the scala directory structure for other source types without having to specify a common parent directory which includes Scala source code. E.g.,

├── build.sbt
├── project
├── vite-resources
│    ├── package.json
│    ├── package-lock.json
│    ├── index.html
│    ├── main.js
│    └── public
│         └── logo.png
└── src
     ├── main
     │     ├── javascript
     │     ├── scala
     │     └── styles
     └── test
           └── scala

In the above directory structure, we would want to include vite-resources, src/main/javascript, and src/main/styles without also including a bunch of other things.

[ptrdom]

I can see how this is useful, and it should be quite easy to implement. I think we can proceed with it if we keep it as simple as possible - that is just have viteResourcesDirectories as SettingKey[Set[sbt.File]] and just loop over those and call copyChanges in viteCopyResources. If we want more than that, then viteCopyResources probably needs to start using fileInputs.

[johnhungerford]

Agreed, but I recommend using Seq instead of set, as the order of copying may matter (e.g., if you intend to overwrite certain files with the same name)