refactor(events): rename all Ionic events to start with ion

BREAKING CHANGES:

Renamed all Ionic events to start with `ion`. The following events were
renamed:

- **Checkbox**
  - `change` -> `ionChange`
- **DateTime**
  - `change` -> `ionChange`
  - `cancel` -> `ionCancel`
- **InfiniteScroll**
  - `infinite` -> `ionInfinite`
- **Menu**
  - `opening` -> `ionDrag`
  - `opened` -> `ionOpen`
  - `closed` -> `ionClose`
- **Option**
  - `select` -> `ionSelect`
- **Picker**
  - `change` -> `ionChange`
- **RadioButton**
  - `select` -> `ionSelect`
- **RadioGroup**
  - `change` -> `ionChange`
- **Refresher**
  - `refresh` -> `ionRefresh`
  - `pulling` -> `ionPull`
  - `start` -> `ionStart`
- **Searchbar**
  - `input` -> `ionInput`
  - `blur` -> `ionBlur`
  - `focus` -> `ionFocus`
  - `cancel` -> `ionCancel`
  - `clear` -> `ionClear`
- **Segment**
  - `change` -> `ionChange`
  - `select` -> `ionSelect`
- **Select**
  - `change` -> `ionChange`
  - `cancel` -> `ionCancel`
- **Slides**
  - `willChange` -> `ionWillChange`
  - `didChange` -> `ionDidChange`
  - `move` -> `ionDrag`
- **TabButton**
  - `select` -> `ionSelect`
- **Tab**
  - `select` -> `ionSelect`
- **Tabs**
  - `change` -> `ionChange`
- **Toggle**
  - `change` -> `ionChange`

Closes #6568

src/components/tabs/test/basic/index.ts

@@ -171,8 +171,8 @@ export class Tab3 {
       </ion-content>
     </ion-menu>
 
-    <ion-tabs #content>
-      <ion-tab tabTitle="Plain List" tabIcon="star" [root]="root1"></ion-tab>
+    <ion-tabs #content (ionChange)="onChange($event)">
+      <ion-tab tabTitle="Plain List" tabIcon="star" [root]="root1" (ionSelect)="onSelect($event)"></ion-tab>
       <ion-tab tabTitle="Schedule" tabIcon="globe" [root]="root2"></ion-tab>
       <ion-tab tabTitle="Stopwatch" tabIcon="stopwatch" [root]="root3"></ion-tab>
     </ion-tabs>
@@ -182,6 +182,14 @@ export class TabsPage {
   root1 = Tab1;
   root2 = Tab2;
   root3 = Tab3;
+
+  onChange(ev) {
+    console.log("Changed tab", ev);
+  }
+
+  onSelect(ev) {
+    console.log("Selected tab", ev);
+  }
 }
 
 @App({