Fix TODOs in into_impl.rs: implement GetMany and simplify collect

[Copilot]

Two stale TODOs in crates/tests/libs/implement/tests/into_impl.rs — array support via GetMany and a commented-out collect() call.

• GetMany: Was panic!() with a TODO. Now properly implemented: reads current position, copies actual = min(remaining, capacity) elements from Vec<T> into [T::Default] via .zip(), advances the position. Added T: Into<<T as Type<T>>::Default> to both struct declarations and impl where clauses (required so the implement macro can generate valid vtable boilerplate; holds for all RuntimeTypes: value/copy types have T::Default = T; interface types satisfy T: Into<Option<T>>).

• collect(): source.collect() doesn't compile because IIterable<T> implements IntoIterator, not Iterator. Replaced the manual for-loop workaround with the correct idiom:

let values: Vec<i32> = source.into_iter().collect();

[Kenny Kerr (kennykerr)]

Copilot fmt failed

[Copilot]

Copilot fmt failed

Fixed in ab90ee7.

[Kenny Kerr (kennykerr)]

Copilot check build failure

[Copilot]

Copilot check build failure

Fixed in 97a5011. The T: Into<<T as Type<T>>::Default> bound was on the impl block but not on the struct declarations — the implement macro generates vtable boilerplate using the struct's where clause, so it couldn't satisfy the bound when building IIterator_Vtbl::new. Added the bound to both struct declarations (Iterator<T> and Iterable<T>).