Update FAQ content

[mike-j-thomas]

Goal

Update FAQ content to only include answers to questions that have been asked during our conversations with users and customers.

The current FAQ includes outdated information and has become convoluted with content that currently does not have a better place to live.

How

• Review customer calls in Gong and pull relevant questions and answers. Review with Mike M during PMMs R Us.
• Add the top five FAQs from this doc to https://fleetdm.com/docs/get-started/faq
• Move pricing FAQs to https://fleetdm.com/docs/get-started/faq
• Replace the FAQs in https://fleetdm.com/pricing with a link to the FAQs in the docs
• Comment out all existing questions on https://fleetdm.com/docs/get-started/faq

[fleet-release]

FAQs, like cloud cities,
Reflect users' truth and needs,
Clear path through the code.