docs: Updated Readme

Author: Vojtěch Václav Porteš

README.md

@@ -19,8 +19,21 @@
 - [Usage](#usage)
 - [Configuration](#configuration)
   - [Fields](#fields)
+    - [Type](#type)
+    - [Operators](#operators)
+    - [Validation](#validation)
   - [Data](#data)
+    - [Group With Modifiers](#group-with-modifiers)
+    - [Group Without Modifiers](#group-without-modifiers)
+    - [Number Values](#number-values)
   - [Builder Props](#builder-props)
+    - [`readOnly`](#readonly)
+    - [`draggable`](#draggable)
+    - [`singleRootGroup`](#singlerootgroup)
+    - [`groupTypes`](#grouptypes)
+    - [`validator`](#validator)
+    - [`onStateChange`](#onstatechange)
+    - [`showValidation`](#showvalidation)
   - [Components](#components)
 - [Theming](#theming)
 - [Localization](#localization)