docs: update contributed tutorial documentation

[wumo1016]

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[nx-cloud]

☁️ Nx Cloud Report

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✅ Successfully ran 6 targets

• nx test:coverage @affine/monorepo
• nx build @affine/storage -- --target x86_64-unknown-linux-gnu --use-napi-cross
• nx build @affine/native -- --target x86_64-pc-windows-msvc --use-napi-cross
• nx build @affine/native -- --target x86_64-apple-darwin --use-napi-cross
• nx build @affine/native -- --target aarch64-apple-darwin --use-napi-cross
• nx build @affine/native -- --target x86_64-unknown-linux-gnu --use-napi-cross

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.96%. Comparing base (27f2209) to head (a43ba9c).
Report is 1 commits behind head on canary.

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #5939      +/-   ##
==========================================
- Coverage   64.05%   63.96%   -0.09%     
==========================================
  Files         364      364              
  Lines       20035    20035              
  Branches     1714     1713       -1     
==========================================
- Hits        12833    12816      -17     
- Misses       6983     7001      +18     
+ Partials      219      218       -1     

Flag	Coverage Δ
server-test	71.21% <ø> (-0.12%)	⬇️
unittest	43.97% <ø> (ø)

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