Feature request: Allow taskfile schema to use options related to remote taskfiles

[c-ameron]

As discussed here, I'd like to see options for the remote taskfiles to be included in taskfile schema.

Having them as a key in the .yml would make it easier to manage the options and a less clunky CLI invocation (especially in the context of sourcing/sharing different remote taskfiles).

As an example

includes:
  my-remote-namespace: https://raw.github.com/my-org/my-repo/main/Taskfile.yml
  offline: true
  auto-update-ttl: weekly

I understand that you don't want to do schema changes while the remote taskfiles are still an experiment, but something to track/think about if it makes it to GA.

Thanks again for your work!