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 !

Inizia individuando i metodi factory dei client menzionati nella issue, inclusi get_git_client e get_build_client, e verifica come le loro dichiarazioni rtype nelle docstring corrispondano ai client restituiti. Determina l’ambito delle factory che richiedono annotazioni e verifica che i tipi restituiti risultanti ripristinino il completamento automatico dell’analizzatore; la issue non indica file o test specifici.