feat(kapa): Add suggested questions to kapa widget

[lena-larionova]

Description

Fixes #2089

I pulled out some common questions from the Kapa dashboard and tried to synthesize them; are there better ways to phrase them?

Notes:

• Questions must be short so that the alignment doesn't get messed up (plus, it's easier to read at a glance). That's why it's "Set up rate limiting in API Gateway" and not "How do I set up rate limiting in API Gateway?". The max limit is somewhere around 35-40 characters.
• You won't be able to see this in the preview because the AI widget doesn't appear there.

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