[Doc] Refine SimCC and IPR algorithm readme with model performance table

[Tau-J]

Motivation

Modification

BC-breaking (Optional)

Use cases (Optional)

Checklist

Before PR:

• I have read and followed the workflow indicated in the CONTRIBUTING.md to create this PR.
• Pre-commit or linting tools indicated in CONTRIBUTING.md are used to fix the potential lint issues.
• Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• New functionalities are covered by complete unit tests. If not, please add more unit tests to ensure correctness.
• The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• CLA has been signed and all committers have signed the CLA in this PR.

[codecov]

Codecov Report

Base: 77.73% // Head: 77.73% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (c84b8f3) compared to base (304f262).
Patch has no changes to coverable lines.

❗ Current head c84b8f3 differs from pull request most recent head 75a215f. Consider uploading reports for the commit 75a215f to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           dev-1.x    #1710   +/-   ##
========================================
  Coverage    77.73%   77.73%           
========================================
  Files          204      204           
  Lines        11716    11716           
  Branches      1956     1956           
========================================
+ Hits          9107     9108    +1     
- Misses        2209     2210    +1     
+ Partials       400      398    -2     

Flag	Coverage Δ
unittests	77.73% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmpose/datasets/transforms/common_transforms.py	82.33% <0.00%> (+0.28%)	⬆️

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