One justfile to run them all

[xunilrj]

Description

This PR brings all the scripts that we have, and push a couple more into one just file (https://github.com/casey/just).

Initially we are just calling the script directly, but we can improve it later.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[JoshuaBatty]

nice!

[zees-dev]

Nice; LGTM 👍

P.S. Could probably specify in readme/doc(s) to use just for running commands

[xunilrj]

P.S. Could probably specify in readme/doc(s) to use just for running commands

Good idea! Done.