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/components/layouts/ViewWithHeader.vue

@@ -1,42 +1,3 @@
-<template>
-  <div
-    class="w-full h-full bg-slate-25 dark:bg-slate-800"
-    :class="{ 'overflow-auto': isOnHomeView }"
-    @keydown.esc="closeWindow"
-  >
-    <div class="flex flex-col h-full relative">
-      <div
-        class="header-wrap sticky top-0 z-40 transition-all"
-        :class="{
-          expanded: !isHeaderCollapsed,
-          collapsed: isHeaderCollapsed,
-          'custom-header-shadow': isHeaderCollapsed,
-          ...opacityClass,
-        }"
-      >
-        <chat-header-expanded
-          v-if="!isHeaderCollapsed"
-          :intro-heading="channelConfig.welcomeTitle"
-          :intro-body="channelConfig.welcomeTagline"
-          :avatar-url="channelConfig.avatarUrl"
-          :show-popout-button="appConfig.showPopoutButton"
-        />
-        <chat-header
-          v-if="isHeaderCollapsed"
-          :title="channelConfig.websiteName"
-          :avatar-url="channelConfig.avatarUrl"
-          :show-popout-button="appConfig.showPopoutButton"
-          :available-agents="availableAgents"
-          :show-back-button="showBackButton"
-        />
-      </div>
-      <banner />
-      <router-view />
-
-      <branding v-if="!isOnArticleViewer" :disable-branding="disableBranding" />
-    </div>
-  </div>
-</template>
 <script>
 import Banner from '../Banner.vue';
 import Branding from 'shared/components/Branding.vue';
@@ -67,7 +28,6 @@ export default {
     ...mapGetters({
       appConfig: 'appConfig/getAppConfig',
       availableAgents: 'agent/availableAgents',
-      widgetColor: 'appConfig/getWidgetColor',
     }),
     portal() {
       return window.chatwootWebChannel.portal;
@@ -141,6 +101,46 @@ export default {
 };
 </script>
 
+<template>
+  <div
+    class="w-full h-full bg-slate-25 dark:bg-slate-800"
+    :class="{ 'overflow-auto': isOnHomeView }"
+    @keydown.esc="closeWindow"
+  >
+    <div class="relative flex flex-col h-full">
+      <div
+        class="sticky top-0 z-40 transition-all header-wrap"
+        :class="{
+          expanded: !isHeaderCollapsed,
+          collapsed: isHeaderCollapsed,
+          'custom-header-shadow': isHeaderCollapsed,
+          ...opacityClass,
+        }"
+      >
+        <ChatHeaderExpanded
+          v-if="!isHeaderCollapsed"
+          :intro-heading="channelConfig.welcomeTitle"
+          :intro-body="channelConfig.welcomeTagline"
+          :avatar-url="channelConfig.avatarUrl"
+          :show-popout-button="appConfig.showPopoutButton"
+        />
+        <ChatHeader
+          v-if="isHeaderCollapsed"
+          :title="channelConfig.websiteName"
+          :avatar-url="channelConfig.avatarUrl"
+          :show-popout-button="appConfig.showPopoutButton"
+          :available-agents="availableAgents"
+          :show-back-button="showBackButton"
+        />
+      </div>
+      <Banner />
+      <router-view />
+
+      <Branding v-if="!isOnArticleViewer" :disable-branding="disableBranding" />
+    </div>
+  </div>
+</template>
+
 <style scoped lang="scss">
 @import '~widget/assets/scss/variables';
 @import '~widget/assets/scss/mixins';