test(cli): migrates tests from ava to jest

[armano2]

Migrates CI tests from ava to jest

Description

While doing this refactor i took opportunity to validate why some of tests was not passing on windows machines and i added appropriate comments.

// npm install is failing on windows machines
// The filename, directory name, or volume label syntax is incorrect.
// await execa('npm', ['install'], {cwd});

There is still one that is failing on windows machine:

• should print full commit message when input from stdin fails
  its actually not an issue but test is failing:

Expected substring: "foo: bar·
Foo bar bizz buzz.·
Closes #123."
Received string:    "⧗   input: foo: bar

Foo bar bizz buzz.

Closes #123."

How Has This Been Tested?

Unrelated

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[armano2]

this is needed as jest is executed from root directory, ava was executed in each package separately

[byCedric]

Yeah I'd figure, I think I briefly discussed this with Mario sometime ago. I'll put it on the list of stuff to do before v9 release 👍

[armano2]

bdw. i do recommend to do squash merges instead (as it will not pollute history with partial commits)

[byCedric]

Don't worry about the commits, we always squash them down 😄

[byCedric]

Looks great, again! ❤️ I can merge it after the types thing 😄