feat(storage): expand user with tilde in local path

[fvaleye]

Description

Support expanding ~ in local paths for DeltaTable storage.

Related Issue(s)

• closes Support ~ for write_deltalake and read operations #1948

Documentation

• Added dirs crate

[Copilot]

Pull Request Overview

This PR adds support for expanding the ~ (tilde) character to the user's home directory in local paths for DeltaTable storage operations. This enhancement allows users to use paths like ~/my_delta_table which will be automatically expanded to the full home directory path.

• Introduces a new expand_tilde_path utility function that handles tilde expansion
• Updates path resolution logic to call tilde expansion before creating local paths
• Adds comprehensive unit tests for the new functionality

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
crates/core/Cargo.toml	Adds dirs crate dependency for home directory detection
crates/core/src/table/builder.rs	Implements tilde expansion logic and integrates it into path resolution
python/tests/test_writer.py	Adds integration test to verify tilde paths work with Delta table writes

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[codecov]

Codecov Report

❌ Patch coverage is 80.95238% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.34%. Comparing base (21bb954) to head (77899ae).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/core/src/table/builder.rs	80.95%	8 Missing and 4 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3717   +/-   ##
=======================================
  Coverage   75.33%   75.34%           
=======================================
  Files         145      145           
  Lines       43751    43811   +60     
  Branches    43751    43811   +60     
=======================================
+ Hits        32961    33010   +49     
- Misses       9195     9202    +7     
- Partials     1595     1599    +4     

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[hntd187]

I was worried us poor windows users would have been left out here, but turns out the dirs crate handles it! :)

[ion-elgreco]

You can use the Polars.testing module here

[fvaleye]

Oh, yes, it would be better only to use @pytest.mark.polars. Thanks!