feat(draft): custom folder to avoid repetitions with `__mocks__`

[scarletquasar]

Summary

Implement customMocks folder feature to avoid __mocks__ folder repetition in monorepos or similar situations (see issue #13647).

Work in progress.

Test plan

• [ ] current tests are passing
• [ ] add units tests
• [x] add e2e tests
• [ ] add type tests
• [ ] documentation

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: scarletquasar / name: Scarlet Rose (6e2fd7697626887fda87f385ba20105a903f4f7c, 2fd13b306e622223d86ddfaf891e9b4798693395, 30f50003edb054bd99ca319c8e0362b8a69ba9e1)

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[scarletquasar]

Just remembering that this PR is not forgotten. Im just having a though time in the work and my time is strictly limited.

[github-actions[bot]]

This PR is stale because it has been open 1 year with no activity. Remove stale label or comment or this will be closed in 30 days.

[github-actions[bot]]

This PR was closed because it has been stalled for 30 days with no activity. Please open a new PR if the issue is still relevant, linking to this one.

[github-actions[bot]]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs. Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.

[SimenB]

👋😅

I think this makes sense as an option 👍 Just needs some documentation I believe? (If you're still up for it)

[cpojer]

Could you update this PR and update the docs?

[cpojer]

Closing due to inactivity. Happy to reopen if activity picks up again.

[github-actions[bot]]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs. Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.