dffml: plugins: Create JSON with with only dffml-model-transformers

Related: #1061
Related: #1401

Author: pdxjohnny

dffml/plugins.json

@@ -0,0 +1,17 @@
+{
+    "@context": {
+        "@vocab": "TODO-dffml-plugins.schema.json"
+    },
+    "comments": "https://github.com/intel/dffml/pull/1061",
+    "plugins": {
+        "parties": {
+            "2nd": [
+                {
+                    "package_registry": "pypi.org",
+                    "package_name": "dffml-model-transformers",
+                    "source_url": "https://github.com/dffml/dffml-model-transformers"
+                }
+            ]
+        }
+    }
+}