feat: Eslint rules (#9839)

# Pull Request Template

## Description

This PR adds new eslint rules to the code base.

**Error rules**

|    Rule name     | Type | Files updated |
| ----------------- | --- | - |
| `vue/block-order`  | error  |  ✅  |
| `vue/component-name-in-template-casing`  | error  |  ✅  |
| `vue/component-options-name-casing`  | error  |  ✅  |
| `vue/custom-event-name-casing`  | error  |  ✅  |
| `vue/define-emits-declaration`  | error  |  ✅  |
| `vue/no-unused-properties`  | error  |  ✅  |
| `vue/define-macros-order`  | error  |  ✅  |
| `vue/define-props-declaration`  | error  |  ✅  |
| `vue/match-component-import-name`  | error  |  ✅  |
| `vue/next-tick-style`  | error  |  ✅  |
| `vue/no-bare-strings-in-template`  | error  |  ✅  |
| `vue/no-empty-component-block`  | error  |  ✅  |
| `vue/no-multiple-objects-in-class`  | error  |  ✅  |
| `vue/no-required-prop-with-default`  | error  |  ✅  |
| `vue/no-static-inline-styles`  | error  |  ✅  |
| `vue/no-template-target-blank`  | error  |  ✅  |
| `vue/no-this-in-before-route-enter`  | error  |  ✅  |
| `vue/no-undef-components`  | error  |  ✅  |
| `vue/no-unused-emit-declarations`  | error  |  ✅  |
| `vue/no-unused-refs`  | error  |  ✅  |
| `vue/no-use-v-else-with-v-for`  | error  |  ✅  |
| `vue/no-useless-v-bind`  | error  |  ✅  |
| `vue/no-v-text`  | error  |  ✅  |
| `vue/padding-line-between-blocks`  | error  |  ✅  |
| ~`vue/prefer-prop-type-boolean-first`~ | ~error~ | ❌ (removed this
rule, cause a bug in displaying custom attributes) |
| `vue/prefer-separate-static-class`  | error  |  ✅  |
| `vue/prefer-true-attribute-shorthand`  | error  |  ✅  |
| `vue/require-explicit-slots`  | error  |  ✅  |
| `vue/require-macro-variable-name`  | error  |  ✅  |


**Warn rules**

|    Rule name     | Type | Files updated |
| ---- | ------------- | ------------- |
| `vue/no-root-v-if`  | warn  |  ❎  |


Fixes https://linear.app/chatwoot/issue/CW-3492/vue-eslint-rules

## Type of change

- [x] New feature (non-breaking change which adds functionality)


## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Fayaz Ahmed <fayazara@gmail.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
Co-authored-by: Pranav <pranav@chatwoot.com>

app/javascript/widget/App.vue

@@ -1,26 +1,3 @@
-<template>
-  <div
-    v-if="!conversationSize && isFetchingList"
-    class="flex flex-1 items-center h-full bg-black-25 justify-center"
-    :class="{ dark: prefersDarkMode }"
-  >
-    <spinner size="" />
-  </div>
-  <div
-    v-else
-    class="flex flex-col justify-end h-full"
-    :class="{
-      'is-mobile': isMobile,
-      'is-widget-right': isRightAligned,
-      'is-bubble-hidden': hideMessageBubble,
-      'is-flat-design': isWidgetStyleFlat,
-      dark: prefersDarkMode,
-    }"
-  >
-    <router-view />
-  </div>
-</template>
-
 <script>
 import { mapGetters, mapActions } from 'vuex';
 import { setHeader } from 'widget/helpers/axios';
@@ -60,10 +37,7 @@ export default {
   computed: {
     ...mapGetters({
       activeCampaign: 'campaign/getActiveCampaign',
-      campaigns: 'campaign/getCampaigns',
       conversationSize: 'conversation/getConversationSize',
-      currentUser: 'contacts/getCurrentUser',
-      hasFetched: 'agent/getHasFetched',
       hideMessageBubble: 'appConfig/getHideMessageBubble',
       isFetchingList: 'conversation/getIsFetchingList',
       isRightAligned: 'appConfig/isRightAligned',
@@ -114,7 +88,7 @@ export default {
       'setBubbleVisibility',
       'setColorScheme',
     ]),
-    ...mapActions('conversation', ['fetchOldConversations', 'setUserLastSeen']),
+    ...mapActions('conversation', ['fetchOldConversations']),
     ...mapActions('campaign', [
       'initCampaigns',
       'executeCampaign',
@@ -354,6 +328,29 @@ export default {
 };
 </script>
 
+<template>
+  <div
+    v-if="!conversationSize && isFetchingList"
+    class="flex items-center justify-center flex-1 h-full bg-black-25"
+    :class="{ dark: prefersDarkMode }"
+  >
+    <Spinner size="" />
+  </div>
+  <div
+    v-else
+    class="flex flex-col justify-end h-full"
+    :class="{
+      'is-mobile': isMobile,
+      'is-widget-right': isRightAligned,
+      'is-bubble-hidden': hideMessageBubble,
+      'is-flat-design': isWidgetStyleFlat,
+      dark: prefersDarkMode,
+    }"
+  >
+    <router-view />
+  </div>
+</template>
+
 <style lang="scss">
 @import '~widget/assets/scss/woot.scss';
 </style>