Add ability to specify disabled paths

Author: jakeboone02

docs/api/querybuilder.mdx

@@ -654,11 +654,11 @@ Pass `true` to display a drag handle to the left of each group header and rule.
 
 ### `disabled`
 
-`boolean` (default `false`)
+`boolean | number[][]` (default `false`)
 
 [Demo with this feature enabled](https://react-querybuilder.github.io/react-querybuilder/#disabled=true)
 
-Pass `true` to disable all subcomponents and prevent changes to the query.
+Pass `true` to disable all subcomponents and prevent changes to the query. Pass an array of paths to disable specific rules and/or groups, e.g. `disabled={[[0]]}` will disable the first rule and its subcomponents but nothing else.
 
 ### `validator`
 

docs/typescript.mdx

@@ -161,5 +161,6 @@ interface Schema {
   enableDragAndDrop: boolean;
   validationMap: ValidationMap;
   independentCombinators: boolean;
+  disabledPaths: number[][];
 }
 ```