new declarations format for operators

[lordlogo2002]

Multiple/Single Argument Operator

Planend definiton

Currently operators can only be added if theri accept only two arguments.
Thats because off the way user input and validation is implemented.
But with this change the operators would be defined in this way:
operations.py:

OPERATIONS = {
  "<tag>": {
        "title": "Addition",
        "symbol": "+",
        "args": (
            "addend a",
            "addend b"
        ),
        "action": lambda a, b: a + b,
        "result-name": "sum"
    },
}

Key	Description
Tag	Used for internal logic to indicate format errors on tags
Title	Indicates the calculation used, displayed in the help menu
Symbol	The symbol that triggers the operator for use
Args	A list of arguments requested from the user and passed in the specified order to the Callable
Action	A Callable whose return value is the result
Result Name	The name given to the result (e.g., "product")