Rule engine for document classification

Here is what the end result should look like, once present in the predictor settings:

{
    "scope": "Overall",
    "key_value_pairs": {
      "rule_config": {
        "EXAMPLE_DOCUMNT_TYPE": {
          "type": "document_type",
          "rules": [
            {
              "confidence": 100,
              "rule_type": [
                "first", # other options: next, last
              ],
              "+rule": [
                "L:THIS RULE MATCHES ONLY FOR EXAMPLE DOCTYPE"
              ]
            }
          ]
        },