[feature] <closest project in mono-repo> should be the default in monorepos

[kaminskypavel]

When working with a monorepo it's a common pattern to jump and test different modules and parts of the monorepo.

currently wallaby present three options :

- pretty ambiguous when talking about a monorepo
- useful if you want to work on a specific module
- is what I use most of the time, and it would be great to use it with the new "Smart start" feature.