Add typing to generated python code and documentation

[t92549]

Typing could easily be added to the generated code by using the operation details.
For example, the options field is an optional map is strings, described like so:

{
    "name": "options",
    "className": "java.util.Map<java.lang.String,java.lang.String>",
    "required": false
}

This could be typed in Python like so:

options: t.Optional[t.Mapping[str, str]] = None

This would also allow for the generation of documentation using sphinx.

[t92549]

We should use google style Python docstrings.
Python types for function arguments in the init, java return type of the Operation in docstring.

[t92549]

Closed by #1049