Implement type hints on top of docstring `rtype`

Hi,

The code is quite well documented, and uses docstring heavily. However, the "Python way" is to use type hints which are powerful and enable a good code completion.

For exaample, the client factory (get_git_client, get_build_client, ...) does not have type hints. Due to how it is written, python analyzers can not infer the returned types and this breaks autocompletion.

Could you please generate them them?

For example something like this:

    def get_git_client(self) -> GitClient:
        """get_git_client.
        Gets the 7.0 version of the GitClient
        :rtype: :class:`<GitClient> <azure.devops.v7_0.git.git_client.GitClient>`
        """
        return self._connection.get_client('azure.devops.v7_0.git.git_client.GitClient')

Thanks !

Comece localizando os métodos factory de cliente mencionados na issue, incluindo get_git_client e get_build_client, e inspecione como as declarações rtype em suas docstrings correspondem aos clientes retornados. Determine o escopo das factories que precisam de anotações e verifique se os tipos de retorno resultantes restauram o autocompletar do analyzer; a issue não especifica arquivos ou testes.