add tutorials.

[yecol]

What do these changes do?

Add tutorials to the repo.

Related issue number

Partial addressed #59 #32

[codecov-io]

Codecov Report

Merging #117 (816064c) into main (512a5b8) will decrease coverage by 13.09%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##             main     #117       +/-   ##
===========================================
- Coverage   78.30%   65.21%   -13.10%     
===========================================
  Files          50       49        -1     
  Lines        4601     4407      -194     
===========================================
- Hits         3603     2874      -729     
- Misses        998     1533      +535     

Impacted Files	Coverage Δ
python/graphscope/client/session.py	64.08% <100.00%> (-8.67%)	⬇️
python/graphscope/interactive/__init__.py	0.00% <0.00%> (-100.00%)	⬇️
python/graphscope/interactive/query.py	0.00% <0.00%> (-94.65%)	⬇️
python/graphscope/deploy/kubernetes/utils.py	12.69% <0.00%> (-61.43%)	⬇️
python/graphscope/deploy/kubernetes/cluster.py	22.34% <0.00%> (-52.84%)	⬇️
...n/graphscope/deploy/kubernetes/resource_builder.py	28.14% <0.00%> (-32.52%)	⬇️
python/graphscope/analytical/app/triangles.py	80.00% <0.00%> (-20.00%)	⬇️
python/graphscope/client/rpc.py	65.32% <0.00%> (-18.51%)	⬇️
python/graphscope/client/utils.py	79.16% <0.00%> (-16.92%)	⬇️
python/graphscope/framework/graph.py	82.67% <0.00%> (-9.37%)	⬇️
... and 14 more

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