Create FAQ page to address most common questions/problems that users may face when using devfiles

[elsony]

Add FAQ page to documentation for most common questions/problems. The intention is to help the user to self-service and reduce the requirement of contacting us for help. This will be an on-going document that we'll add entries as we go questions from devfile users/writers as needed.

The initial content of the FAQ will need to gather from current adopters/users, e.g. devfile/sample writers, e.g. MW teams, who provide the stacks, tools provider like odo, etc.

[rkratky]

JIRA: https://issues.redhat.com/browse/RHDEVDOCS-2870

[michael-valdron]

As mention in my comment, we will review this issue in upcoming refinement calls.

[michael-valdron]

For criteria, it would be good to have a few good initial questions and answers to scope this issue then continue to build this page as more challenges are encountered.