fix: Support Pydantic v2 via shims.

[bvanelli]

Weheat is a dependency from HA, so this PR tries to make it compatible with multiple versions of Pydantic to help with the upgrade described in home-assistant/core#99218.

I'm aware that the files are auto-generated, but the OpenAPI generator seems to support either pydantic v1 or v2, not the backwards compatible version. I'd suggest first generating a release with the backwards compatible version, the doing an upgrade to the version two at some point in the future.

There are no tests on the repo, so I did basic import testing with a dockerfile:

FROM python:3.12

WORKDIR /app
COPY . /app
RUN pip install .
RUN python -c "from weheat import *"

[jesperraemaekers]

I checked this with pydantic 1.x and 2.x and it worked for both.

[jesperraemaekers]

I will merge this and release it soon. I'm looking into making some basic test cases to avoid regression on this topic.
Thanks @bvanelli !

[bvanelli]

Thanks for the fast response @jesperraemaekers , I thought about adding basic test cases but I thought it would be too much out of scope, since the files are auto generated.