Add listsAsArrays prop and rule-value-list-item class documentation

Author: jakeboone02

docs/api/classnames.mdx

@@ -44,6 +44,17 @@ import { standardClassnames as sc } from 'react-querybuilder';
       label: `.${sc.valueSource}`,
       valueSources: ['value', 'field'],
     },
+    {
+      name: 'fb1',
+      label: `Value list`,
+      operators: [{ name: 'between', label: 'between' }],
+      valueSources: ['field', 'value'],
+      comparator: f => f.name === 'fb2',
+    },
+    {
+      name: 'fb2',
+      label: `.${sc.valueListItem}`,
+    },
   ]}
   combinators={[{ name: 'and', label: `.${sc.combinators}` }]}
   getOperators={() => [{ name: '=', label: `.${sc.operators}` }]}
@@ -138,6 +149,7 @@ import { standardClassnames as sc } from 'react-querybuilder';
         ],
       },
       { field: 'f3', operator: '=', value: 'f1' },
+      { field: 'fb1', operator: 'between', value: 'fb2,fb2', valueSource: 'field' },
     ],
   }}
 />

docs/api/querybuilder.mdx

@@ -720,6 +720,34 @@ Pass `false` to automatically add an "empty" option with value `"~"` and label `
 
 Pass `true` to automatically add a rule to new groups. If a `query` prop is not passed in, a rule will be added to the root group when the component is mounted. If a `query` prop is passed in with an empty `rules` array, no rule will be added automatically.
 
+### `listsAsArrays`
+
+`boolean` (default `false`) [_Click for demo_](https://react-querybuilder.js.org/react-querybuilder/#listsAsArrays=true)
+
+Pass `true` to update rule values that represent lists with proper arrays instead of comma-separated strings. Applies when `valueEditorType` is "multiselect" and when a rule's `operator` is "between", "notBetween", "in", or "notIn".
+
+For example, the default behavior for the "between" operator might produce this rule:
+
+```json {4}
+{
+  "field": "f1",
+  "operator": "between",
+  "value": "f2,f3",
+  "valueSource": "field"
+}
+```
+
+When `listsAsArrays` is true, the rule's `value` will be an array:
+
+```json {4}
+{
+  "field": "f1",
+  "operator": "between",
+  "value": ["f2", "f3"],
+  "valueSource": "field"
+}
+```
+
 ### `independentCombinators`
 
 `boolean` (default `false`) [_Click for demo_](https://react-querybuilder.js.org/react-querybuilder/#independentCombinators=true)