Allow setting BaseObj need and optional params via dictionary

[ramaro]

It is not always ideal to hardcode every BaseObj argument via self.need() or self.optional().

Passing a dictionary to define these can be useful:

class Mountain(BaseObj):
    def new(self):
        self.args(
            {
                "need": {"height": {"type": int, "msg": "height is an int"}},
                "optional": {
                    "has_snow": {
                        "type": Boolean,
                        "default": False,
                        "msg": "has_now is a Boolean",
                    }
                },
            }
        )

Alternatively, self.args can also be a BaseObj