feat: impl IntoIterator on ByteArray

[tdelabro]

Feature Request

Describe the Feature Request

In the corelib.
I'm under the impression ByteArray doesn't implement IntoIterator, making it impossible to loop over using the language loop syntax.
But it implement index and len. So I think it could be possible to impl IntoIterator too. Is there a reason we didn't do it

I think it makes sense to impl IntoIterator<felt252> where the pending word is returned last, as it is, without any indication of pending_word_len

If the feature request is approved, would you be willing to submit a PR?
(Help can be provided if you need assistance submitting a PR)

• Yes
• No

[tdelabro]

We should also implement the hash trait:

Is it h(data0, .., dataN, pending_word, pending_word_len)?

And the serde trait

[Nanle100]

i can work on this issue