ENH: separate ray

[qianduoduo0904]

What do these changes do?

Related issue number

Fixes #xxxx

Check code requirements

• tests added / passed (if needed)
• Ensure all linting tests pass

[codecov]

Codecov Report

Merging #6 (e956baa) into main (4aa2003) will decrease coverage by 1.18%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main       #6      +/-   ##
==========================================
- Coverage   92.20%   91.02%   -1.18%     
==========================================
  Files          49       41       -8     
  Lines        3888     3188     -700     
  Branches      750      638     -112     
==========================================
- Hits         3585     2902     -683     
+ Misses        219      213       -6     
+ Partials       84       73      -11     

Flag	Coverage Δ
unittests	90.87% <100.00%> (-1.19%)	⬇️

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

Impacted Files	Coverage Δ
python/xoscar/metrics/api.py	77.39% <ø> (-15.81%)	⬇️
python/xoscar/backends/communication/base.py	100.00% <100.00%> (ø)
python/xoscar/backends/communication/dummy.py	97.67% <100.00%> (ø)
python/xoscar/backends/communication/socket.py	97.65% <100.00%> (ø)
python/xoscar/backends/communication/ucx.py	66.39% <100.00%> (ø)
python/xoscar/backends/pool.py	95.51% <100.00%> (-0.01%)	⬇️
python/xoscar/debug.py	92.70% <100.00%> (+0.07%)	⬆️
python/xoscar/serialization/__init__.py	100.00% <100.00%> (ø)

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[aresnow1]

LGTM