✨ Support auto-knitted html reports during `ln.finish()`

[falexwolf]

These auto-knitted reports come with the .nb.html suffix.

Resolves:

• https://github.com/laminlabs/laminr/issues/110

Considered also supporting .nb.html for the CLI but concluded that it'd be more dangerous than beneficial:

• https://github.com/laminlabs/lamin-cli/pull/97

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.36%. Comparing base (c54f99f) to head (0732cec). Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
lamindb/_finish.py	87.50%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2213 +/- ## ========================================== - Coverage 92.36% 92.36% -0.01% ========================================== Files 54 54 Lines 6566 6572 +6 ========================================== + Hits 6065 6070 +5 - Misses 501 502 +1 ```

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[github-actions[bot]]

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