Added canister_info management canister API

[dansteren]

Call it like this:

import { Canister, ic, update } from 'azle';
import {
    CanisterInfoArgs,
    CanisterInfoResult,
    managementCanister
} from 'azle/canisters/management';

export default Canister({
    getCanisterInfo: update(
        [CanisterInfoArgs],
        CanisterInfoResult,
        async (args) => {
            const result = await ic.call(managementCanister.canister_info, {
                args: [
                    {
                        canister_id: args.canister_id,
                        num_requested_changes: args.num_requested_changes
                    }
                ]
            });
            return result;
        }
    )
});

Closes #1281

[lastmjs]

Also put the license comments