Specialize BINARY_ADD and INPLACE_ADD

[markshannon]

Add specialization "families" for PEP 659 adaptive interpreter for BINARY_ADD and INPLACE_ADD

BINARY_ADD INPLACE_ADD are worth specializing for a few reasons.

• The current dispatch mechanism is very general, but addition is heavily biased towards a few types.
• The ad-hoc specialization of s += ".." for strings does a lot of work that could be done at specialization time
• With a better implementation of integers More efficient implementation of integers #42, unspecialized integer addition will be dominated by dispatch.

[markshannon]

See #101 (comment) for an alternative specialization mechanism

[markshannon]

I think we can count this as done.