feat: Support authentication with HuggingFace login

[nameexhaustion]

ref huggingface/dataset-viewer#2997 (review)
ref huggingface/hub-docs#1345 (comment)

Support a login mechanism Hugging Face uses that stores the token in a file under $HF_HOME/token.

We attempt to source the token in the following order:

• storage_options passed to pl.(scan|read)_(...)
• HF_TOKEN environment variable
• $HF_HOME/token on the filesystem

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 40 lines in your changes missing coverage. Please review.

Project coverage is 80.47%. Comparing base (2a6ebec) to head (4c91ae1).

Files	Patch %	Lines
crates/polars-io/src/cloud/options.rs	0.00%	40 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17881      +/-   ##
==========================================
- Coverage   80.48%   80.47%   -0.01%     
==========================================
  Files        1507     1507              
  Lines      197610   197640      +30     
  Branches     2813     2813              
==========================================
+ Hits       159040   159046       +6     
- Misses      38049    38073      +24     
  Partials      521      521              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.