Create asset metadata template

[vuldin]

NPM has a REST API, and this page also defines some metadata details returned on requests to various endpoints: https://github.com/npm/registry/blob/master/docs/REGISTRY-API.md

Here are some ideas for asset metadata:

{
  "_id": "adf87afd87ag8h78h78hbcv",
  "name": "@org/asset-name",
  "version": "0.1.0",
  "description": "asset description",
  "keywords": ["asset", "model", "others"],
  "homepage": "https://somepage.com",
  "license": "MIT",
  "main": "index.js",
  "repository": {
    "type": "git",
    "url": https://github.com/someorg/somerepo"
  },
  "type": "model"
  "schema": {
    "type": "avro",
    "url": "http://schema-registry.org:8081/subject/someasset/1"
  },
  "maintainers": ["[email protected]", "[email protected]"],
  "isPrivate": true,
  "dependencies": {
    "@org1/asset1": "1.0.1",
    "@org1/asset2": "2.0.1",
    "@org2/asset1": "1.0.3"
  }
}

This is just a first draft based on npm and github. I'm not sure about isPrivate and dependencies... npm handles unpublished or private assets some other way (need to look into details). And dependencies may not make sense for our assets.