Create resource handler to get version

[iwysiu]

We should create a resource handler that returns the version.

Running a get request to the url (with no query parameters) will return a version object:
'''
{
"name" : "15ffcf528ee3",
"cluster_name" : "docker-cluster",
"cluster_uuid" : "1vbTN7ROS4Sw-8mHbTAIVQ",
"version" : {
"distribution" : "opensearch",
"number" : "2.6.0",
"build_type" : "tar",
"build_hash" : "7203a5af21a8a009aece1474446b437a3c674db6",
"build_date" : "2023-02-24T18:58:37.352296474Z",
"build_snapshot" : false,
"lucene_version" : "9.5.0",
"minimum_wire_compatibility_version" : "7.10.0",
"minimum_index_compatibility_version" : "7.0.0"
},
"tagline" : "The OpenSearch Project: https://opensearch.org/"
}
'''