[DOC] utils: add some basic information

doc/readme.md

@@ -8,6 +8,7 @@
 - [Store](store.md)
 - [Observer](observer.md)
 - [Virtual DOM](vdom.md)
+- [Utility functions](utils.md)
 
 ## Miscellaneous
 - [Quick Start](quick_start.md)

doc/utils.md

@@ -0,0 +1,41 @@
+# 🦉 Utility functions 🦉
+
+Owl export a few useful utility functions, to help with common issues. Those
+functions are all available in the `owl.utils` namespace.
+
+## Content
+
+- [`whenReady`](#whenready)
+- [`loadJS`](#loadjs)
+- [`loadTemplates`](#loadtemplates)
+- [`escape`](#escape)
+- [`debounce`](#debounce)
+- [`patch` and `unpatch`](#patchandunpatch)
+
+## `whenReady`
+
+The function `whenReady` is useful to register some code that need to be executed
+as soon as the document (page) is ready:
+
+```js
+owl.utils.whenReady(function () {
+    const qweb = new owl.QWeb();
+    const app = new App({ qweb });
+    app.mount(document.body);
+});
+```
+
+## `loadJS`
+
+## `loadTemplates`
+
+## `escape`
+
+## `debounce`
+
+## `patch` and `unpatch`
+
+
+
+
+