Document "advanced" features

[stephanielee9]

Related: #523. We should have a notebook(s) or include this info in current notebooks that is the next step to basics. Things we can include:

• dry-run (explain what it means also)
• any options we're missing
• BYO IBM token when we have it
• explanation on how we use Runtime
• verbatim / turn off compilation
• Explain how credits are used / what features cost
• DD strategies