Install with `tools` (only allowlisted tools, with versions from `.tool-versions`)

[MPV]

What do we think about the idea of adding support for something like this:

[...]
steps:
  - uses: action/checkout@v4
  - uses: asdf-vm/actions/install@v2
    with:
      tools: |
        action-validator

...so if you have a .tool-versions file like this:

$ cat .tool-versions
action-validator 0.5.3
gcloud 1.2.3

...then it would only asdf install action-validator 0.5.3 (and not gcloud).

My hope is that this could simplify/speed up many jobs where you only need one particular tool for the thing you want to run.

[gvkhna]

Here's a simple workaround:

      - name: Install asdf
        uses: asdf-vm/actions/setup@v3
      - name: Install asdf plugins
        uses: asdf-vm/actions/plugins-add@v3
      - name: Install asdf tools
        run: |
          asdf install nodejs
          asdf install python

Just list what you need installed manually like so