feat: Support for schema in connectors and datasources

[portellaa]

import os

os.environ['LOG_LEVEL'] = 'DEBUG'

os.environ['YDATA_BASE_URL'] = "fabric.dev.gcp.ydata.ai"
os.environ["YDATA_TOKEN"] = "<TOKEN>"

from ydata.sdk.connectors import Connector

print(Connector.list())

connector = Connector.get('<uid>')
print(f'schema \n{connector.schema}')

there is a version available in the pypi with these developments: ydata-sdk==0.11.0.dev8

[fabclmnt]

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