[Feature Request] Add `stol` function

[YichengDWu]

Review Mojo's priorities

• [X] I have read the roadmap and priorities and I believe this request falls within the priorities.

What is your request?

atol is in the std but not stol, a similar function to strtol in C.

What is your motivation for this change?

More functionalities to parser strings.

Any other details?

No response

[gxyd]

Can I maybe try to work on this issue?

[soraros]

@gxyd You can just go ahead!

[bgreni]

Since atol in mojo already accepts an optional base argument why would we have need for a second function in this case?

[YichengDWu]

atol recognizes "1234" and stol regonizes "1234asda".

[bgreni]

Ah I see the distinction between the behaviours now thank you.