fix(templates): add template tabs #8207 (#8208)

Author: ramonornela

scripts/templates/tabs/html.tmpl

@@ -0,0 +1,3 @@
+<ion-tabs>
+  $TAB_CONTENT  
+</ion-tabs>

scripts/templates/tabs/scss.tmpl

@@ -0,0 +1,3 @@
+.$FILENAME {
+
+}

scripts/templates/tabs/ts.tmpl

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { NavController } from 'ionic-angular';
+$TAB_IMPORTS
+
+@Component({
+  templateUrl: '$FILENAME.html'
+})
+export class $CLASSNAME {
+  
+  $TAB_VARIABLES
+
+  constructor(public navCtrl: NavController) {}
+}