Is your feature request related to a problem? Please describe.
This is feature request inspired from stack-overflow code-blcok copying feature. What I basically mean is whenever someone copies a code block from my quartz page, a simple credit attribution text gets to the top of the code, mentioning the source of the code, time of retrieval etc.

Describe the solution you'd like
The solution to this is straight-forward, enabling copy with attribution option. Maybe we can provide an option to the user in config.ts if they want to enable this or not.

Additional context
Add any other context or screenshots about the feature request here.