Add pre-commit for sapp and fix lint error before#100

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WangGithubUser wants to merge 3 commits intofacebook:mainfrom

WangGithubUser:add_precommit

Commits on Aug 8, 2023

Add pre-commit for sapp to fix lint error before commit
WangGithubUser
committed
Run pre-commit to fix lint error in sapp
WangGithubUser
committed
doc: let user use 'pre-commit run' instead of 'black .', 'flake8' and 'usort format .' in pull request template
WangGithubUser
committed