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/CannedResponse.vue

@@ -10,6 +10,7 @@ export default {
       default: '',
     },
   },
+  emits: ['replace'],
   computed: {
     ...mapGetters({
       cannedMessages: 'getCannedResponses',
@@ -46,6 +47,6 @@ export default {
   <MentionBox
     v-if="items.length"
     :items="items"
-    @mentionSelect="handleMentionClick"
+    @mention-select="handleMentionClick"
   />
 </template>