add ability to query a text tree with a depth variable

src/api/queries/TextdepartRecursiveWithDepth.gql

@@ -0,0 +1,7 @@
+#import "../fragments/TextrefTreeFields.gql"
+
+query TextdepartRecursive($id: Int!) {
+  textref(id: $id) {
+INPUT
+  }
+}