Add MAC address type

[JonasKs]

See #8

[samuelcolvin]

looking at https://github.com/mentalisttraceur/python-macaddress/blob/main/macaddress.py I think it would be easier to implement this directly ourselves.

[JonasKs]

I’m thinking:

• strip separators (any non-hex char), so any MAC, written without :, written with - etc will still work
• return MAC-object with : separators (like RFC suggests)

I know Cisco tend to return MAC and IPv6 with weird formats, such as HHHH:HHHH:HHHH:HHHH.

[JonasKs]

I suggest only supporting EUI48. Any other format should be explicit, in my opinion.

[samuelcolvin]

Sounds good, from what little I know of Mac addresses.

We can do some of the checking in rust.

[JonasKs]

EUI-64 should probably be possible too, as I see PSQL supports both.

I'm not sure whether they should be the same, or have two different classes?

We can do some of the checking in rust.

I'll start with a pure Python implementation (unless someone beats me to it), and then I'll iterate on it with rust to see if it's faster (and worth the cost of maintenance). The decision can then be made at a later point.

As a side question, since the JSON schema org is no longer adding types ( json-schema-org/json-schema-vocabularies#49 (comment) ), is. @dmontagu (author of pydantic/pydantic#5029 (review) ) aware of this package? There might be a need for JSON schema extensions 😊

[samuelcolvin]

These types should support JSON Schema via __pydantic_modify_json_schema__, or whatever we end up calling it.

No need for pydantic to know about them specifically.