feat: format gas number report to contain reported gas with underscore

[kanthgithub]

Change Description

• new function added to format gas numbers with _
• this is a pure function and marked internal

Issue Link

https://github.com/rhinestonewtf/modulekit/issues/78

[kanthgithub]

@zeroknots @kopy-kat @derekchiang Please help to review the PR

[kopy-kat]

currently, this also reverses the numbers (eg 2685120 becomes 021_586_2

[kanthgithub]

currently, this also reverses the numbers (eg 2685120 becomes 021_586_2

@kopy-kat updated with fix. please check

[kopy-kat]

LGTM thanks @kanthgithub