Rework solution api

[ellnix]

• Renamed the run function to lazy_run
• Added tests for lazy_run
  • While adding them I realized that App may need to be in the library and that these tests cannot run in CI because they depend on the clash dir, which inspired #72
  • I made another commit to delete the tests which I will revert when we have a way to run these tests in CI
• Made all the params and return types as generic as possible.
• Removed SuiteRun and replaced it with a call to map() :facepalm:
• Refactored App.run slightly

Regarding App

I suggest

• Moving App to lib
• Moving all the helper functions (functions that do not have a corresponding command) into App
• Removing the functions that have commands corresponding to them from App and just having them as regular functions in main.rs (or as part of a Cli type)
• Making the App constructor to take a single package_name parameter:

  let app = App::new("dev.CoCtus.coctus");

This would then separate the responsibility between calling the commands and the helper functions which we could use in tests. It would also prepare for #61 by allowing configuration to be stored in App and be used by users of the lib.

[ellnix]

I don't know if the unable_to_run and get_result functions are particularly useful as they can only ever be called from one place but it's whatever.

The purpose was more to make each function easier to skim + group and document what those lines of code were doing.

The behavior change in --timeout needs fixing though.

Done, sorry about that.