feat(techio): adding toggle module doc

Author: NaejDoree

playground/extensions/extensions-toggle.md

@@ -0,0 +1,73 @@
+# ToggleModule
+
+This modules allows you to show elements only when a toggle of the cg-player is in a certain state.
+This can help to create debug modes.
+
+## Setup
+⚠ This module requires the [GraphicEntityModule](https://github.com/CodinGame/codingame-game-engine/tree/master/engine/modules/entities) to work.
+
+Add the dependency in the `pom.xml` of your project.
+```xml
+<dependency>
+	<groupId>com.codingame.gameengine</groupId>
+	<artifactId>module-toggle</artifactId>
+	<version>3.2.0</version>
+</dependency>
+```
+
+And setup the module and the toggles in your `config.js`.
+
+```javascript
+import { GraphicEntityModule } from './entity-module/GraphicEntityModule.js'
+import { ToggleModule } from './toggle-module/ToggleModule.js'
+
+// List of viewer modules that you want to use in your game
+export const modules = [
+  GraphicEntityModule,
+  ToggleModule
+]
+
+// The list of toggles displayed in the cg-player
+export const options = [
+  {
+  // The name displayed over the toggle
+    title: 'MY TOGGLE',
+    // Getters and setters for the on/off state of your toggle
+    get: function () {
+      return toggles.myToggle // replace "myToggle" by the name of the toggle you want to use
+    },
+    set: function (value) {
+      toggles.myToggle = value // replace "myToggle" by the name of the toggle you want to use
+      ToggleModule.refreshContent()
+    },
+    // What will be displayed depending of the state of your toggle
+    values: {
+      'TOGGLED ON': true,
+      'TOGGLED OFF': false
+    }
+  },
+  {
+    title: 'MY OTHER TOGGLE',
+    ...
+  }
+]
+
+// The list of the toggles used by the ToggleModule
+// replace "myToggle" by the name of the toggle you want to use
+export const toggles = {
+  myToggle: true, // default value of your toggle
+  myOtherToggle: false
+}
+
+```
+
+## Usage
+
+`Referee.java`
+```java
+  // Associating `myEntity` to the true state of `myToggle`
+  toggleModule.displayOnToggleState(myEntity, "myToggle", true);
+  // My entity will only be displayed when `myToggle` is true 
+  // (on the `TOGGLED ON` position according to our previous setup)
+```
+