write use cases

[ivotron]

Some ideas for use cases:

• Dev environment
• CI
• Performance regressions
• Test case selection (test only relevant changes).
• monorepos. Linked with above

some other ideas here or here.

Once done, there are a couple of things that can be done as part of this:

• add section in the readthedocs documentation about use cases
• add a section in the README about use cases.
• add a link on the top bar of the website. If this is too much then we can make Documentation a menu with:
  • Getting Started
  • Use cases
  • Guides
  • Reference