Implementation of the asyncio consumer

[Nictec]

Hi,
I implemented the asyncio consumer in a similar way as the producer. All missing async functions provided by the C++ library are now implemented in the pybind11 classes and I use futures in python to convert the functions with callbacks to async functions. The reason I started with this implementation is because I need the async consumer in a project with FastAPI myself.
Tests could be a little bit patchy, for that reason i would appreciate help if i missed something

[BewareMyPower]

Please remove the binaries from the git commits

[BewareMyPower]

Traceback (most recent call last):
  File "asyncio_test.py", line 27, in <module>
    from pulsar.asyncio import (
  File "/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/pulsar/asyncio.py", line 165, in <module>
    class Consumer:
  File "/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/pulsar/asyncio.py", line 216, in Consumer
    async def seek(self, position: tuple[int, int, int, int] | pulsar.MessageId):
TypeError: 'type' object is not subscriptable

Could you also make the tests pass for Python 3.8? Though Python 3.8 will reach EOL on the next month (2024-10)

[Nictec]

I will try to fix the issues this week.

[Nictec]

I found another issue with the schema system in my asyncio implementation, i will fix this too before the next commit.

[BewareMyPower]

Let me fix the broken CI first

[BewareMyPower]

Could you rebase to master to resolve the conflicts and have the CI fixed?

[BewareMyPower]

Please remove these binaries.

[merlimat]

@BewareMyPower I removed the binary files

[BewareMyPower]

When you wrap an xxxAsync API from pulsar-client-cpp, the correct way is:

// release the GIL because xxxAsync does not access any Python objects
py::gil_scoped_release release;
// Pass the callback directly because pybind11 acquires the GIL automatically when the callback is executed
xxx.xxxAsync(yyy, callback);

[BewareMyPower]

Please also fix the wrapper in consumer.cc

[BewareMyPower]

This GIL acquire is not necessary

[BewareMyPower]

It should release the GIL rather than acquire the GIL

[BewareMyPower]

I will continue the work in #277