Precision option for tensor display

[antimora]

Pull Request Template

Checklist

• Confirmed that run-checks all script has been executed.
• Made sure the book is up to date with changes in this PR.

Changes

1. Add global precision option
2. Add formatter precision option
3. Add unit tests
4. Improve locking of the global option

Testing

New unit test for formatter precision option. The global precision settings were tested manually because the change affects other test threads.

[mepatrick73]

LGTM. Just a few left out comments to be removed. I'll approve in advance 👍

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 86.29%. Comparing base (d770b1f) to head (7dba380).
Report is 2 commits behind head on main.

Files	Patch %	Lines
crates/burn-tensor/src/tensor/api/base.rs	76.66%	7 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2139   +/-   ##
=======================================
  Coverage   86.29%   86.29%           
=======================================
  Files         694      694           
  Lines       89005    89070   +65     
=======================================
+ Hits        76806    76865   +59     
- Misses      12199    12205    +6     

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[laggui]

Ohh that's pretty useful! Thanks for adding this 😄

[antimora]

Thanks for reviewing my precision PR.

The left comments were intentional. Do you think I should still remove them?

[laggui]

The only comment left to document restrictions seems fine to me :) thanks for the changes