[🌍 Translation]: Selenium Library Installation page

[titusfortner]

What needs to be translated

#824 needs translating. These are full content updates for working with Selenium Libraries

[alaahong]

Completed zh-cn by #882

[kzhirata]

Translated to Japanese by #887

[diemol]

@luisfcorreia do you know someone who wants to help us contribute to this?