[docs] TestCafe 2.0 documentation

[titerman]

What is your Scenario?

What are you suggesting?

• [ ] #7203
• [ ] #7202 Implementation
• [ ] Write Release Notes (RC1: https://github.com/DevExpress/testcafe/releases/tag/v1.20.1-rc.1 )

What alternatives have you considered?

No response

Additional context

No response