feat: add commit_batch API

[wjones127]

This allows users to commit a sequence of transactions as one new version. Right now, this only supports Append transactions, which are trivial to merge.

Closes #3097

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.30159% with 16 lines in your changes missing coverage. Please review.

Project coverage is 77.91%. Comparing base (8069936) to head (76e974d).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
rust/lance/src/dataset/write/commit.rs	87.30%	6 Missing and 10 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3142      +/-   ##
==========================================
+ Coverage   77.89%   77.91%   +0.02%     
==========================================
  Files         242      242              
  Lines       82183    82296     +113     
  Branches    82183    82296     +113     
==========================================
+ Hits        64020    64125     +105     
+ Misses      14973    14965       -8     
- Partials     3190     3206      +16     

Flag	Coverage Δ
unittests	77.91% <87.30%> (+0.02%)	⬆️

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