[Docs] Add precision alignment doc

[DrownFish19]

PR types

Others

PR changes

Docs

Description

Add precision alignment doc.

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.78%. Comparing base (483fff4) to head (2588e1f).
Report is 2 commits behind head on develop.

❗ Current head 2588e1f differs from pull request most recent head 7056fb3

Please upload reports for the commit 7056fb3 to get more accurate results.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #9346      +/-   ##
===========================================
- Coverage    52.91%   52.78%   -0.13%     
===========================================
  Files          673      673              
  Lines       107742   107697      -45     
===========================================
- Hits         57009    56852     -157     
- Misses       50733    50845     +112     

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