[new pluggin] - Mojo

### Is your feature request related to a problem? Please describe

it requieres depensies

### Describe the proposed solution

Regular pluggin
source here https://www.modular.com/mojo

### Describe similar `asdf` features and why they are not sufficient

not included for now

### Describe other workarounds you've considered

Install mojo by myself without asdf

Start by reviewing the asdf plugin conventions and the Mojo source linked in the issue. Clarify the required dependencies, supported installation targets, and expected version behavior before implementation. Done should mean Mojo can be installed and managed through a working asdf plugin.

Written by the indexing model from the issue text.