Auto-install missing versions in asdf local

Copied from https://github.com/asdf-vm/asdf/pull/1714

I frequently want to be able to upgrade my `.tool-versions` straight to the newest version of a plugin with the `asdf local` command. At the moment, the first repository i perform this on, i'll get an error that the latest version isn't installed:

```shellsession
$ asdf local ruby latest
version 3.3.0 is not installed for ruby ❌
```

Instead of having to read the latest version from the error output, then type, e.g., `asdf install ruby 3.3.0`, then redo my command, i'd like to be able to have `asdf local` do the installation automatically. This will save me a tedious manual step.

With this change, i can do it all in one go:

```shellsession
$ echo "local_command_auto_install_missing_version = yes" >> .asdfrc
$ asdf local ruby latest
...installs Ruby 3.3.0...
$ cat .tool-versions
ruby 3.3.0 🎉
```

## Other Information

Apologies for the PR spam. Hopefully this one will be acceptable. I previously misunderstood a few things about how asdf works under the hood – i think this is a better way to address what i actually wanted, namely less manual version swizzling 😁

Also, i'm happy to find a better name for the config option.

Start at the asdf local command entry point and inspect how .asdfrc settings, plugin versions, and .tool-versions are handled. Verify the requested setting with the ruby latest example; done means asdf local installs a missing resolved version when configured and writes that version to .tool-versions, while preserving the current error behavior otherwise.

Written by the indexing model from the issue text.