Added Statistics calculation

Statistics now show calculated values

node_modules/@mui/x-date-pickers/esm/internals/models/fields.d.ts

@@ -0,0 +1,12 @@
+import type { FieldSection } from "../../models/index.js";
+import { RangePosition } from "./pickers.js";
+export interface FieldRangeSection extends FieldSection {
+  dateName: RangePosition;
+}
+/**
+ * Props the single input field can receive when used inside a Picker.
+ * Only contains what the MUI components are passing to the field, not what users can pass using the `props.slotProps.field`.
+ */
+export interface BaseSingleInputFieldProps {
+  id?: string;
+}