Improve behavior ssl_credentials

[ZeusFSX]

Is your feature request related to a problem? Please describe.
When I use ssl=True but without pass credentials it rise the error:

from grpc_requests import Client
client = Client.get_by_endpoint("some-domain:443", ssl=True)

I get the error:

File /.venv/lib/python3.12/site-packages/grpc_requests/client.py:104, in BaseClient.__init__(self, endpoint, symbol_db, descriptor_pool, channel_options, ssl, compression, credentials, interceptors, **kwargs)
     96     if credentials:
     97         _credentials = {
     98             k: load_data(v) if isinstance(v, str) else v
     99             for k, v in credentials.items()
    100         }
    102     self._channel = grpc.secure_channel(
    103         endpoint,
--> 104         grpc.ssl_channel_credentials(**_credentials),  # type: ignore
    105         options=self.channel_options,
    106         compression=self.compression,
    107     )
    108 else:
    109     self._channel = grpc.insecure_channel(
    110         endpoint, options=self.channel_options, compression=self.compression
    111     )

TypeError: grpc.ssl_channel_credentials() argument after ** must be a mapping, not NoneType

But when I added CredentialsInfo everything works fine:

client = Client.get_by_endpoint("some-domain:443", ssl=True, credentials=CredentialsInfo(root_certificates=None, private_key=None, certificate_chain=None))

Describe the solution you'd like
When set ssl=True but credentials=None set the default value for credentials=CredentialsInfo(root_certificates=None, private_key=None, certificate_chain=None)

Describe alternatives you've considered
Or simple, improve docs how to works with ssl

Additional context
By the way thank you for your lib, it's better than work with stubs

[ViridianForge]

Seems like a straight-forward enough ask, I'll pick this up when I get some free time to work on the project.