From<u8, u16, u32> for u64 implementations

[SwayStar123]

Description

Adds implementations for From, From, From for u64

Partially addresses #5797

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.

[IGI-111]

N.B.: don't use "partially closes X" in issue descriptions, Github isn't smart enough to figure out the "partially" and will enable the autoclose.

If you just want it to be linked, use different vocabulary, such as "partially addresses".

[SwayStar123]

N.B.: don't use "partially closes X" in issue descriptions, Github isn't smart enough to figure out the "partially" and will enable the autoclose.

If you just want it to be linked, use different vocabulary, such as "partially addresses".

Thanks for the tip!