style: apply fixes for eslint issues [cw-3590] (#10210)

These fixes are all auto generated and can be merged directly

Fixes the following issues

1. Event used on components should be hypenated
2. Attribute orders in components
3. Use `unmounted` instead of `destroyed`
4. Add explicit `emits` declarations for components, autofixed [using
this
script](https://gist.github.com/scmmishra/6f549109b96400006bb69bbde392eddf)


We ignore the top level v-if for now, we will fix it later

app/javascript/dashboard/components/widgets/conversation/VariableList.vue

@@ -11,6 +11,7 @@ export default {
       default: '',
     },
   },
+  emits: ['selectVariable'],
   computed: {
     ...mapGetters({
       customAttributes: 'attributes/getAttributes',
@@ -62,7 +63,7 @@ export default {
     v-if="items.length"
     type="variable"
     :items="items"
-    @mentionSelect="handleVariableClick"
+    @mention-select="handleVariableClick"
   />
 </template>