Show example load() call for each rule

[cvrebert]

Whenever I start using a new Starlark rule, the first step is to load() it in my BUILD file. Therefore it would be handy if the Stardoc output for each rule showed an appropriate load() statement that I could directly copy-paste. That way, users don't have to manually tweak the path to the .bzl file, change the final slash to a colon, etc., which is pure avoidable tedium.

[brandjon]

That sounds like a nice feature. It might not be applicable in all environments since the repo might be imported by a different non-standard name in the user's WORKSPACE file, but that use is comparatively rare.

[alexeagle]

FWIW I've started adding this feature in https://docs.aspect.dev

[tetromino]

Now that we have OriginKey in the protos, this should be fairly easy to implement in the renderer for anyone who is interested