Pk/expose application protocol to users

[Peeeekay]

Added application protocol for the services created by this package

Starlark code successfully run. Output was:
{
    "contract_helper_service_url": "http://127.0.0.1:8330",
    "explorer_url": "http://127.0.0.1:8331",
    "near_node_rpc_url": "http://127.0.0.1:8332",
    "network_name": "localnet",
    "root_validator_key": {
        "account_id": "test.near",
        "public_key": "ed25519:3Kuyi2DUXdoHgoaNEvCxa1m6G8xqc6Xs7WGajaqLhNmW",
        "secret_key": "ed25519:2ykcMLiM7vCmsSECcgfmUzihBtNdBv7v2CxNi94sNt4R8ar4xsrMMYvtsSNGQDfSRhNWXEnZvgx2wzS9ViBiS9jW"
    },
    "wallet_url": "http://127.0.0.1:8334"
}