Bring in `batched_jacobian`

[avik-pal]

• [x] batched_jacobian for ForwardDiff
• [x] Add tests
• [x] Nested AD
• [x] Documentation
  • [x] Add batched jacobian to nested ad list

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 88.77005% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 87.51%. Comparing base (26c8429) to head (a359f3d).

:exclamation: Current head a359f3d differs from pull request most recent head 15b0c04. Consider uploading reports for the commit 15b0c04 to get more accurate results

Files	Patch %	Lines
src/helpers/nested_ad.jl	73.91%	12 Missing :warning:
ext/LuxForwardDiffExt/utils.jl	68.75%	5 Missing :warning:
ext/LuxForwardDiffExt/batched_ad.jl	95.52%	3 Missing :warning:
src/helpers/autodiff.jl	83.33%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #625 +/- ## ========================================== + Coverage 87.37% 87.51% +0.14% ========================================== Files 43 47 +4 Lines 2241 2339 +98 ========================================== + Hits 1958 2047 +89 - Misses 283 292 +9 ```

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