Consider authorization for OpenAPI request examples

[arredond]

It's very nice that Gitbook takes OpenAPI security schemes into account and shows them in OpenAPI blocks, but the code examples don't, which may cause significant confusion among users.

In this screenshot, I'd expect the code example to include something like -H "Authorization: Bearer $API_TOKEN".

Ideally, the "Try it" module would also have the specified authorization method pre-checked, though I recognize this is harder since you use an external provider for it.

[addisonschultz]

Nice suggestions - I'll relay to the team!