feat: webhook-connector

[duonganhthu43]

sample webhook connection yaml

connections:
  - name: ingest
    config: !Webhook
      port: 8086
      endpoints:
        - path: /ingest
          verbs: 
            - POST
            - DELETE
          schema: !Inline |
            {
              "users": {
                "schema": {
                  "fields": [
                    {
                      "name": "id",
                      "typ": "Int",
                      "nullable": false
                    },
                    {
                      "name": "name",
                      "typ": "String",
                      "nullable": true
                    },
                    {
                      "name": "json",
                      "typ": "Json",
                      "nullable": true
                    }
                  ]
                }
              }
            }