Create new page for autoscaling

[viktor-f]

Is your feature request related to a problem? Please describe.
We currently have a page for cluster api that has some information about autoscaling. We want to extract this information to a separate page and add more information to it.

Describe the solution you'd like
Create a new page for autoscaling, it should be in "For app devs"/"go deeper", probably after "metrics" in the list.

The page should cover information about both pod autoscaling and cluster autoscaling, including how they can work together. The information about cluster autoscaling on this page can be used as a start for that part.

Describe alternatives you've considered

Additional context