Add typing metadata and include py.typed
in sdist
#1782
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I submitted this pull request to enhance the opcua-asyncio library's compatibility with static type checkers like mypy. While running mypy in my project, I encountered the following error:
This issue arises because mypy requires either inline type annotations or the presence of a py.typed file in the package to recognize it as typed. By adding the py.typed file and including it in the source distribution (sdist), we ensure that mypy and other type checkers can properly analyze the asyncua module, thereby improving the developer experience and code reliability.