example(GraphQuestions): add graph_questions_testing dataset

[anda-ren]

Description

1. add graph_questions_testing dataset
2. add dataset util function from_dict

Modules

• UI
• Controller
• Agent
• Client
• Python-SDK
• Others

Checklist

• run code format and lint check
• add unit test
• add necessary doc

[codecov]

Codecov Report

Merging #2075 (33e8a3e) into main (be7fb58) will increase coverage by 8.42%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #2075      +/-   ##
============================================
+ Coverage     82.13%   90.55%   +8.42%     
============================================
  Files           424       98     -326     
  Lines         21859    10772   -11087     
  Branches       1230        0    -1230     
============================================
- Hits          17954     9755    -8199     
+ Misses         3353     1017    -2336     
+ Partials        552        0     -552     

Flag	Coverage Δ
controller	?
standalone	90.55% <100.00%> (+0.04%)	⬆️
unittests	90.55% <100.00%> (+0.04%)	⬆️

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

Impacted Files	Coverage Δ
client/starwhale/api/_impl/dataset/model.py	98.64% <100.00%> (+0.05%)	⬆️

... and 327 files with indirect coverage changes

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[tianweidut]

LGTM