MRG: Use hatchling as build backend

[hoechenberger]

Also dynamically generate version number via hatch-vcs

Addresses #1174

cc @ofek

Merge checklist

Maintainer, please confirm the following before merging. If applicable:

• [x] All comments are resolved
• [ ] This is not your own PR
• [ ] All CIs are happy
• [x] PR title starts with [MRG]
• [x] whats_new.rst is updated

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (e6ca823) 97.63% compared to head (3800913) 97.61%.

Files	Patch %	Lines
mne_bids/__init__.py	60.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1204 +/- ## ========================================== - Coverage 97.63% 97.61% -0.03% ========================================== Files 40 40 Lines 8681 8685 +4 ========================================== + Hits 8476 8478 +2 - Misses 205 207 +2 ```

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[hoechenberger]

Thanks Will do later tonight

[hoechenberger]

@sappelhoff I think we're good to go