Support creating a `Ref` of a type that implements `TryFromBytes`

Support fallible constructors on `Ref` for types that implement `TryFromBytes`

For example, would like to be able to do something like the following:

```rust
#[derive(TryFromBytes)]
#[repr(u8)]
enum MyEnum {
V0 = 0,
V1 = 1,
}

let (enum_ref, remainder) = Ref::::try_from_prefix(bytes)?;
```