Docs: Write "Test lifecycle" page and add diagram

docs/_data/sitenav.yml

@@ -3,14 +3,16 @@
   sub:
     - name: Getting Started
       href: /intro/
+    - name: Download
+      href: /intro/#download
     - name: Browser Runner
       href: /browser/
     - name: Browser Support
       href: /browser/#browser-support
     - name: Command-line Interface
       href: /cli/
-    - name: Download
-      href: /intro/#download
+    - name: Test lifecycle
+      href: /lifecycle/
     - name: QUnit 2.0 Upgrade Guide
       href: /upgrade-guide-2.x/
 - name: Documentation

docs/api/QUnit/hooks.md

@@ -1,7 +1,7 @@
 ---
 layout: page-api
 title: QUnit.hooks
-excerpt: Add global callbacks to run before or after each test.
+excerpt: Add global callbacks to run before or after every test.
 groups:
   - extension
 redirect_from:
@@ -12,15 +12,15 @@ version_added: "2.18.0"
 `QUnit.hooks.beforeEach( callback )`<br>
 `QUnit.hooks.afterEach( callback )`
 
-Register a global callback to run before or after each test.
+Register a global callback to run before or after every test.
 
 | parameter | description |
 |-----------|-------------|
 | callback (function) | Callback to execute. Called with an [assert](../assert/index.md) argument. |
 
-This is the equivalent of applying a `QUnit.module()` hook to all modules and all tests, including global tests that are not associated with any module.
+This is the equivalent of adding a hook in all modules, and all tests, including global tests that are not grouped in a module.
 
-Similar to module hooks, global hooks support async functions or returning a Promise, which will be waited for before QUnit continues executing tests. Each global hook also has access to the same `assert` object and test context as the [QUnit.test](./test.md) that the hook is running for.
+As with module hooks, global hooks may be async functions or return a Promise, which will be waited for before QUnit continues executing tests. Each global hook also has access to the same `assert` object and test context as the [QUnit.test](./test.md) that the hook is running for.
 
 For more details about hooks, refer to [QUnit.module § Hooks](./module.md#hooks).