kubectl secret decode plugin

Created a simple kubectl plugin to decode values in secrets configs.

• drop kubectl-decode anywhere in your PATH (ie. ~/bin/kubectl-decode)
• make executable chmod +x ~/bin/kubectl-decode
• run command and pass in name of secret

> kubectl decode docker-registry
{
  ".dockercfg": "{\n  \"docker.my-registry.io\": {\n    \"auth\": \"bWEtdXnononononononoM2MDA=\",\n    \"email\": \"not@val.id\"\n  },\n  \"docker.my-registry.i:5000\": {\n    \"auth\": \"a2V5Y2hlc3RfononononononmFmYzQ3Yjk0OGY=\",\n    \"email\": \"not@val.id\"\n  }\n}\n"
}

Ref. https://kubernetes.io/docs/tasks/extend-kubectl/kubectl-plugins/#writing-kubectl-plugins