Port read and write functions

[mtsokol]

Hi @willow-ahrens @hameerabbasi,

Here's a minimal PR to port fread and fwrite to finch-tensor.

[hameerabbasi]

Will this limit us to just this format?

[mtsokol]

No, it's just a dependency. Here's a list of all supported formats: https://willowahrens.io/Finch.jl/stable/guides/fileio/#Finch.fread

[hameerabbasi]

Do we need to pull in any other dependencies for other formats?

[mtsokol]

@willow-ahrens Are there other IO related dependencies that we should install during the setup to fully support fread and fwrite?

In Finch.jl in Project.toml I found three more:

[weakdeps]
HDF5 = "f67ccb44-e63f-5c2f-98bd-6dc0ccc4ba2f"
NPZ = "15e1cf62-19b3-5cfa-8e77-841668bca605"
SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
TensorMarket = "8b7d4fe7-0b45-4d0d-9dd8-5cc9b23b4b77"

[willow-ahrens]

HDF5, NPZ, and TensorMarket are required for binsparse and ttx files.

[willow-ahrens]

These should be added with pkg.add when we add Finch, or loaded dynamically depending on whether we want to take a dependency on hdf5

[mtsokol]

Thanks! I load them dynamically.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 77.41935% with 7 lines in your changes missing coverage. Please review.

Project coverage is 89.73%. Comparing base (12c94c2) to head (8813fd0).
Report is 26 commits behind head on main.

Files	Patch %	Lines
src/finch/io.py	70.83%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #70      +/-   ##
==========================================
- Coverage   91.25%   89.73%   -1.52%     
==========================================
  Files           8        9       +1     
  Lines         720      828     +108     
==========================================
+ Hits          657      743      +86     
- Misses         63       85      +22     

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[mtsokol]

@hameerabbasi it's ready for another review. All IO dependencies are loaded dynamically (once) when a specific file extension is present.