feat: add try_deref method for NullableTrait<T>

[tdelabro]

Feature Request

There is a deref that panic, there is a deref_or that takes a default value, but we could easily add a try_deref that would return an Option<T>.

Describe Alternatives

Using the TryInto trait: imp TryNullableTIntoT<T> of TryInto<Nullable<T>, T>.

Related code

cairo/corelib/src/nullable.cairo

Lines 19 to 31 in a93f3df

	pub impl NullableImpl<T> of NullableTrait<T> {
	fn deref(self: Nullable<T>) -> T {
	match match_nullable(self) {
	FromNullableResult::Null => core::panic_with_felt252('Attempted to deref null value'),
	FromNullableResult::NotNull(value) => value.unbox(),
	}
	}
	fn deref_or<+Drop<T>>(self: Nullable<T>, default: T) -> T {
	match match_nullable(self) {
	FromNullableResult::Null => default,
	FromNullableResult::NotNull(value) => value.unbox(),
	}
	}

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)

No, it can be an easy task for a new contributor