Feature Request: Add `version-file` input

### Feature request

The GitHub Action ecosystem has started to allow alternative input for selecting versions.

Add a new input `version-file` that can extract the version from a `.tool-versions` file.

See https://asdf-vm.com/manage/configuration.html and https://mise.jdx.dev/dev-tools/#tool-resolution-flow.

Kubectl is available at https://mise-versions.jdx.dev/tools/kubectl