Add Robot tabs with examples in Get Started and Advanced Usage sections

[iulianatodoran]

In this PR:

• setup and examples for the Get Started > Write and execute first test for your app section
• robot tab in Advanced usage >

  • Run tests from the command line

  • What is reverse port forwarding and when to use it > How to setup reverse port forwarding + small fixes for the other languages to be consistent among each other

    • ❗for the Robot tab did not assign any value to the device_id > need to clarify what will be there

      

  • Connect AltTester® Unity SDK running inside the app to AltTester® Server

  • Execute tests concurrently

  • Logging > AltTester® Unity SDK logging

❗ There is one subsection left to be updated with the robot tab, in Logging > AltDriver logging where I think should be handled by a developer of the team