Add --output json to all our binaries for init so we can parse data in a nice orderly fashion

[tommyv1987]

Currently, when trying to automate testing, the process stdout for a binary on init is frustratingly long to parse all the output.

Let's follow wasmd footsteps and and the arg --output json on init to print the relevant information:

for example:

"\n\n      _ __  _   _ _ __ ___\n     | '_ \\| | | | '_ \\ _ \\\n     | | | | |_| | | | | | |\n     |_| |_|\\__, |_| |_| |_|\n            |___/\n\n             (gateway - version 1.1.1)\n\n    \nInitialising gateway test-data-gateway...\nGateway \"test-data-gateway\" was already initialised before! Config information will be overwritten (but keys will be kept)!\nSaved configuration file to \"/Users/tommyvez/.nym/gateways/test-data-gateway/config/config.toml\"\nGateway configuration completed.\n\n\n\nIdentity Key: 3jCDdg5uGE9n4NMiKUE7mTfRAQeKNCQkdYuT6XB69uCJ\nSphinx Key: 3fq49FEbLzE7zLCvvkT6Jh43TPjsbfc215MD5c2uaW2e\nOwner Signature: owneraddress\nHost: 127.0.0.1 (bind address: 127.0.0.1)\nVersion: 1.1.1\nMix Port: 1789, Clients port: 9000\nData store is at: \"/Users/tommyvez/.nym/gateways/test-data-gateway/data/db.sqlite\"\n"```

To:

{
   "identity_key": "3jCDdg5uGE9n4NMiKUE7mTfRAQeKNCQkdYuT6XB69uCJ",
   "sphinx_key": "3fq49FEbLzE7zLCvvkT6Jh43TPjsbfc215MD5c2uaW2e",
   "owner_signature": "3DtSfLaDu2av8SCccu8ZwiRA9BDu9P2NDMuZnj2VtvJWwdiExLJqSd3hPZj7Huh9LBPhnJFv1PsMxiaHw76u592t",
   "host": "127.0.0.1 (bind address: 127.0.0.1)",
   "version": "1.1.1", 
   "mix_port": 1789, 
   "clients_port": 9000,
   "data_store": "/Users/tommyvez/.nym/gateways/test-data-gateway/data/db.sqlite"
}

This will make life 10x for automation