👷(jest) Move build chain to ESM

[dubzzz]

Description first opened as #4590

⚠️ Minor breaking change

The build chain of @fast-check/jest has been CommonJS-based since day 1. With ESM moving forward in the ecosystem, it's time to move ourselves to the new standard and adapt our build chains to ESM.

Unfortunately it may have some subtle impacts on our users as our package will not be a CJS one offering a ESM fallback anymore. I will rather be the opposite: an ESM package with a fallback to CJS. It implies that we moved ESM related files closer to the root of the package (we could have kept them in esm/) and moved the CJS ones further in the file structure (we had to move them).

Another subtle impact is that it would impose our users to run at least Node ≥12.17.0. But it was already a need for this package due to its dependencies.

As such we consider it as a breaking change.

Checklist — Don't delete this checklist and make sure you do the following before opening the PR

• [x] The name of my PR follows gitmoji specification
• [x] My PR references one of several related issues (if any)
  • [x] New features or breaking changes must come with an associated Issue or Discussion
  • [x] My PR does not add any new dependency without an associated Issue or Discussion
• [x] My PR includes bumps details, please run yarn bump and flag the impacts properly
• [x] My PR adds relevant tests and they would have failed without my PR (when applicable)

Advanced

• [x] Category: ⚠️ Minor breaking change
• [x] Impacts: Honestly none expected!

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[github-actions[bot]]

👋 A preview of the new documentation is available at: http://66a427f176df8d7a5a5a270b--dubzzz-fast-check.netlify.app

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.80%. Comparing base (231ffae) to head (e36dfd2). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #5165 +/- ## ======================================= Coverage 94.80% 94.80% ======================================= Files 230 230 Lines 9260 9260 Branches 2715 2714 -1 ======================================= Hits 8779 8779 Misses 481 481 ``` | [Flag](https://app.codecov.io/gh/dubzzz/fast-check/pull/5165/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Nicolas+DUBIEN) | Coverage Δ | | |---|---|---| | [unit-tests](https://app.codecov.io/gh/dubzzz/fast-check/pull/5165/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Nicolas+DUBIEN) | `94.80% <ø> (ø)` | | | [unit-tests-18.x-Linux](https://app.codecov.io/gh/dubzzz/fast-check/pull/5165/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Nicolas+DUBIEN) | `94.80% <ø> (ø)` | | | [unit-tests-20.x-Linux](https://app.codecov.io/gh/dubzzz/fast-check/pull/5165/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Nicolas+DUBIEN) | `94.80% <ø> (ø)` | | | [unit-tests-22.x-Linux](https://app.codecov.io/gh/dubzzz/fast-check/pull/5165/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Nicolas+DUBIEN) | `94.80% <ø> (ø)` | | | [unit-tests-latest-Linux](https://app.codecov.io/gh/dubzzz/fast-check/pull/5165/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Nicolas+DUBIEN) | `94.80% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Nicolas+DUBIEN#carryforward-flags-in-the-pull-request-comment) to find out more.

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