Add documentation for asdf-dojo

[Jonatan-Chaverri]

Add documentation on how to install and manage dojo versions using asdf-dojo.

[Jonatan-Chaverri]

@glihm let me know if I can take care of this one

[kariy]

yes i think we can have a small section about installing thru asdf in the quick start section.

[Jonatan-Chaverri]

@tarrencev @kariy created a PR to add dojo as part of asdf registry https://github.com/asdf-vm/asdf-plugins/pull/1003