[Add] Get K, R, T from CameraParameter by a single method

[LazyBusyYang]

• Add a method to get K, R, T in type ndarray. The dimension of K can be configured through arguement.

[codecov]

Codecov Report

Merging #60 (f29de4c) into main (af3b750) will increase coverage by 0.08%.
The diff coverage is 94.44%.

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
+ Coverage   82.71%   82.79%   +0.08%     
==========================================
  Files         158      158              
  Lines       11606    11614       +8     
==========================================
+ Hits         9600     9616      +16     
+ Misses       2006     1998       -8     

Flag	Coverage Δ
unittests	82.79% <94.44%> (+0.08%)	⬆️

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Impacted Files	Coverage Δ
mmhuman3d/data/data_converters/h36m.py	75.57% <0.00%> (ø)
mmhuman3d/core/cameras/camera_parameters.py	100.00% <100.00%> (ø)
mmhuman3d/data/data_converters/pw3d.py	98.87% <100.00%> (ø)
mmhuman3d/data/data_converters/surreal.py	90.44% <100.00%> (ø)
...man3d/data/datasets/pipelines/hybrik_transforms.py	92.11% <0.00%> (+1.80%)	⬆️

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