[http-generator-core] added required props

[mrguamos]

This is to add support for required label on fields that are not nullable (any of "NotNull", "NotEmpty", "NotBlank")

  "components": {
    "schemas": {
      "Provider": {
        "required": [
          "firstName",
          "lastName"
        ],
        "type": "object",
        "properties": {
          "firstName": {
            "type": "string",
            "nullable": false
          },
          "middleName": {
            "type": "string"
          },
          "lastName": {
            "type": "string",
            "nullable": false
          }
        }
      }
    }
  }

Sample redoc

[SentryMan]

LGTM

[SentryMan]

your branch is out of date, update it and we should be good