[Revamp] Add support for custom imports

[kishtarn555]

Add support to include non-karel libraries

import some.module

Proposed solution

Add the option to load modules that are kinda like this:

class Module {
    package: string // "some.module"
    functions: Functions[] //Give the Karel signature of the function, but excecute Javascript code
    variables: Variable //Global variables that it adds
    requieredFunctions: FunctionSignature[] // What functions it requieres YOU to code
}

Why?

• Allow extending the language without needing a new compiler
• Allow for communication problems

Difficulties

• There's this difference between the compiler and the interpreter
• There are two interpreters one in JS (designed to run in the browser), and one in C++ (designed to run fast, for online judges and such)
  • How should we make modules work on C++ Interpreter? Should they be in C++? Javascript? Lua? Another program that the interpreter communicates with? (this requieres a protocol, then)
  • For the JS interpreter, as it is "easy" with eval. It may open security concerns

[kishtarn555]

I... I don't know if this one, I'll be able to pull off before october

[ccepeda]

Importing modules could also allow to give the students already coded difficult-to-implement functions that they could use during the contest.

It is a good idea for a future revamp. It is not needed right now.