Fixing property parsing issue on Rust 1.78+

[matterpreter]

Rust introduced a change to std::slice::from_raw_parts() that breaks this crate. The panics caused by this change occur when parsing properties with the most prevalent being those of type TDH_INTYPE_UNICODESTRING in my testing.

To resolve this issue, this MR adds checks to validate the assertions made in std::slice::from_raw_parts() . These are:

1. the pointer must not be NULL
2. the pointer must be aligned
3. the total size of the slice not to exceed isize::MAX

I focused on resolving the wide string conversion, but I also added a proposed fixed for arrays though I was unable to validate it.

Reference:

• regression: unsafe precondition(s) violated: slice::get_unchecked_mut requires that the index is within the slice rust-lang/rust#123285
• https://github.com/rust-lang/rust/blob/a8773d53bea79d80e5e6ea0e602130be7faa6cbe/library/core/src/slice/raw.rs#L93
• Toggle assert_unsafe_precondition in codegen instead of expansion rust-lang/rust#120594

[n4r1b]

lgtm! Thanks @matterpreter