* prefer install binray for opencv

* clean the code

* rename BinaryPeferredPackageIndex

* adjust minimum version of python

* clean the code

* remove duplicated CI

* [Docs] Add README.md and CONTRIBUTING.md

* add section: Learn more

* add introduction

* refine

* refine

* resolve comments

* remove a line

* simplify introduction

* resolve comments

* Add pyupgrade pre-commit hook

* fix ut

* remove comments

* add required lib for vis

* fix comment