Print global vars (without an explicit task to do so)

[ghostsquad]

Sometimes it's very nice to be able to store variables in 1 location (such as in a taskfile), and be able to re-use them programmatically else where. Currently, if I wanted to manage a variable in task, and use it in another script or github action or something, I'd write this:

vars:
   FOO: bar

tasks:
   vars:get:foo:
      cmds:
      - echo '{{.FOO}}'

and call with task vars:get:foo

I feel this could be simplified with something like

task -var foo

[trulede]

@vmaerten I think this one is solved with .dotenv files.

[andreynering]

Closing as a duplicate of #167

EDIT: Actually, let's keep #931 open