Added a missing py.typed file for wheel

[AVOstap]

Hi. Types and a py.typed marker have been added in PR #109.
The marker was also specified in MANIFEST.in

Unfortunately MANIFEST.in does not affect binary distributions such as wheels.

This is the structure of the RECORD file during the installation of the package from wheel

aiodns-3.1.1.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
aiodns-3.1.1.dist-info/LICENSE,sha256=6wRV01EpQl7TmYg81xCSPePiRqUQ4uuE2fAAMtC77Jc,1070
aiodns-3.1.1.dist-info/METADATA,sha256=qM6KoP0Ot6pFAF-izMoNBgmGsIlTQfieU4X0nN5lobI,3994
aiodns-3.1.1.dist-info/RECORD,,
aiodns-3.1.1.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
aiodns-3.1.1.dist-info/WHEEL,sha256=yQN5g4mg4AybRjkgi-9yy4iQEFibGQmlz78Pik5Or-A,92
aiodns-3.1.1.dist-info/top_level.txt,sha256=5J2m3NWP4dezFZNpQoHaj8mv472iPcUzFboQoqWcEe4,7
aiodns/__init__.py,sha256=8uXR1WHCoHlToHl4AH_EaxAxpsA4oIiyor8DABjsvq4,5742
aiodns/__pycache__/__init__.cpython-312.pyc,,
aiodns/__pycache__/error.cpython-312.pyc,,
aiodns/error.py,sha256=fnNPLc8ceLk9drumwt-6Un5iiowyWApTe_VIoJ5gT5U,134

[saghul]

Thank you!