Make the process library more IDE-friendly

[kustosz]

Pull Request Description

Makes the Process API require fewer arguments upfront, making it more IDE friendly.

Important Notes

This is a much smaller change than actually needed for this library.
The fact that it uses Text to handle std streams is plain wrong – it should be using streams instead, such that
piping can be done without any memory overhead. This, however, will break in the presence of caching, until we have
proper support for streaming data in the interactive mode. Therefore this change is mostly cosmetic and the whole thing is marked unstable.

Checklist

Please include the following checklist in your PR:

• The documentation has been updated if necessary.
• All code conforms to the Scala, Java, and Rust style guides.
• All documentation and configuration conforms to the markdown and YAML style guides.
• All code has been tested where possible.