fix(docgen): inline esupports.metagen template function definitions

[jneidel]

So they show up in the wiki.

Current state

Here in the wiki for the default implementation in the template it only show the function() part:

That it is only saying function() is just confusing.

Desired state

I would like to see the full function definition, so I can copy over the ones that I like and adjust what I don't like in my config:

[jneidel]

@vhyrro You're doing a great job with the youtube videos! Without them the project would be significantly harder to get into.

[max397574]

this is nice ig
but I think this is also something that should be fixed in the docgen

[jneidel]

I think this is also something that should be fixed in the docgen

That would probably be a better solution in the long-term 😄

[vhyrro]

Thanks for the temporary fix! Functions with an immediate return will be resolved in the docgen soon enough, I added it to my TODO list :)