Expose ic.print as print and improve for objects

[dansteren]

User Stories
As a canister developer,
I want to be able to log to std.out by calling print() in addition to ic.print,
So that I don't have to learn some new non-standard method of logging in Python.

As a canister developer,
I want to be able to log any complex objects with print(some_complex_object)
So that I don't have to wrap them in json.dump (which may not even be possible) or other stuff.

Acceptance Criteria

Given:

from kybra import Principal, Record, query, void

class User(Record):
    id: Principal
    username: str

@query
def print() -> void:
    user = {
        "id": Principal.from_str('aaaaa-aa'),
        "username": "user1"
    }
    print(message)

When calling dfx canister call my_canister some_method
Then the following is output in the terminal where the replica is running

{'id': Principal(aaaaa-aa), 'username': 'user1'}

This should look just like it does in a normal python repl.

Note
We should ideally be able to print any candid type: principals, vecs, funcs, services, results... We should determine if all that will be supported in this PR before we start.