Implement Typestate Deserializer

[krakow10]

• Closes Enforce Chunk Order #589

Enforces an absolute chunk order. Only relevant state is included in each stage of the deserializer, so collections which are not yet needed are not yet created, and values which are no longer used are dropped.

Notes:

• A new InnerError variant UnexpectedChunk is introduced.
• I really like trait bounds
• This is a fair bit of code just to enforce a chunk order

Performance

I saw the 1000 parts deserialize benchmark fluctuate wildly among my test systems (+50% throughput), but that may not be an indication of anything at all because no other benchmarks are affected.