feat(learning): feature_store & graph_store V1

[Yi-Eaaa]

What do these changes do?

Step 1: Implement GraphScope-based PyG Remote Backend and complete the end-to-end integration of GraphScope and PyG. (Finished) Step 2: Get data from the Server through PyG Remote Backend and support sampling on the Client side. (Finished)

Related issue number

PyG Remote Backend Based on GraphScope #3739

[welcome[bot]]

Thanks for submitting your first pull request! You are awesome! 🤗 Please make sure you have signed the CLA, as this is a mandatory check before a PR being merged. Welcome to the GraphScope community! 🎉 You can meet the community on DingTalk or Slack.

[CLAassistant]

All committers have signed the CLA.

[Zhanghyi]

@Yi-Eaaa Could you make sure that the PR-Check has passed?

[github-actions[bot]]

Please check the preview of the documentation changes at https://1ecdb51f.graphscope-docs-preview.pages.dev

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 61.08%. Comparing base (95a3d1e) to head (8272495). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
python/graphscope/client/session.py	0.00%	6 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4237       +/-   ##
===========================================
+ Coverage   34.33%   61.08%   +26.74%     
===========================================
  Files         126      126               
  Lines       13235    13241        +6     
===========================================
+ Hits         4544     8088     +3544     
+ Misses       8691     5153     -3538     

Files with missing lines	Coverage Δ
python/graphscope/client/session.py	67.39% <0.00%> (+8.77%)	:arrow_up:

... and 58 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 95a3d1e...8272495. Read the comment docs.