[Feature] Implement 'docs' config for sources

[jeroenruytingsae]

Describe the feature

Currently, the 'docs' property is not working for sources.

Source: https://docs.getdbt.com/reference/resource-configs/docs

It would be a great value for my project to add it.
Best thing would be the implementation of the 'show' property, but 'node_color' would be useful as well.

Reason:
I have a package (bronze > silver) that I import in another package (silver > gold). My source is showing up twice. I need two packages because silver and gold are in different target systems.

Describe alternatives you've considered

I tried different ways of combining the two packages, but nothing worked to eliminate the duplicate.

Who will this benefit?

Users with medallion architecture with different silver and gold systems.

Are you interested in contributing this feature?

No response

Anything else?

No response