[FR]: Extend docs to explain difference to other/similar/mirrored functions

[hofbi]

What is the current behavior?

No response

Describe the feature

Some of your rules such as expand_template are also available with the same name and interface in other projects such as skylib's expand template. Maybe you could provide a brief explanation about the main differences between your rules and the others similar as you do it in https://docs.aspect.build/rulesets/aspect_bazel_lib/docs/tar