Exctract vue global plugins into separate file

Lets us re-use it in tests / storybook etc

src/plugins.ts

@@ -0,0 +1,8 @@
+import Vue from 'vue';
+import VueCompositionAPI from '@vue/composition-api';
+import VueRouter from 'vue-router';
+import { VTooltip } from 'v-tooltip';
+
+Vue.use(VueCompositionAPI);
+Vue.use(VueRouter);
+Vue.directive('tooltip', VTooltip);