Add ProjectPackageVersions as subcommand

[edoardottt]

See https://docs.deps.dev/api/v3alpha/#getprojectpackageversions.

The PR should add the subcommand (in the cmd folder), the API structs and the methods necessary to interact with the API.

Ping me here if you need additional help :)

[shivankurchavan]

id like to work on this issue

[edoardottt]

Amazing! Let me know if you understand what you should do by looking at the codebase or you need a lil bit of guidance :)

[edoardottt]

everything okay? @shivankurchavan please let me know otherwise I'll have to assign to another dev

[shivankurchavan]

Hey, sorry about that. Actually I am not able to solve it. Please go ahead and assign it to someone else.

[edoardottt]

Understood, no worries :) thanks for the update!

[edoardottt]

done