[Swift] Loading unaligned flatbuffers objects

Hello,

I'm the maintainer of the flatbuffers swift port, and we have a couple of changes within the pipeline https://github.com/google/flatbuffers/pull/8484#issuecomment-2594701128 that might be important for arrow.

TLDR: We refactored the implementation of a bytebuffer to directly read from `[Data, UInt8, ContiguousBytes, pointers]` aka without copying the data from those objects into our own internal storage. And we want to know if this will break anything, and if we need to return the flag `allowReadingUnalignedObjects` since in theory the first 4 bytes of the and byte buffer should be a valid root for a Flatbuffer object even if unaligned. One way to say that this byte buffer has a valid flat buffer object is to use the verifier before reading any data

Wasn't sure where to tag this, so sorry in advance

### Component(s)

Swift

Start with the Swift port's byte buffer implementation and the verifier, then review the linked FlatBuffers pipeline discussion. Determine whether direct reads from Data, UInt8, ContiguousBytes, and pointers affect unaligned FlatBuffer objects. Done means documenting the compatibility result and deciding whether allowReadingUnalignedObjects must be returned.

Written by the indexing model from the issue text.