Consolidate code snippets from the docs and `/examples` folder

[bsideup]

Followup of #1150.
Since the snippets are runnable now, we could merge them with the examples we have to improve the discoverability and reduce the duplicates between those two sets.

[kiview]

Also see #1177

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If you believe this is a mistake, please reply to this comment to keep it open. If there isn't one already, a PR to fix or at least reproduce the problem in a test case will always help us get back on track to tackle this.

[vcvitaly]

It's not really clear what snippets, could you maybe clarify if this is still relevant?

[Kamveno]

I would like to contribute

[akash-yadagouda]

Need some more information here, what exactly the Consolidate code snippets is.