feat: Add rich text support for widget welcome tagline (#11666)

# Pull Request Template

## Description

This PR adds rich text support for the widget welcome tagline, enabling
users to format the message using basic text styling (bold, italics,
links, etc.)
https://github.com/chatwoot/chatwoot/pull/11629#issuecomment-2932448975

## Type of change

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

## How Has This Been Tested?

### Screenshots
<img width="1100" alt="image"
src="https://github.com/user-attachments/assets/eef2bfd3-7bc9-4aea-b21d-078f6b29f334"
/>
<img width="448" alt="image"
src="https://github.com/user-attachments/assets/713c6b07-d0dc-4c8f-bfba-cd119a858375"
/>



## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] 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
- [ ] 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: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/components-next/Editor/Editor.vue

@@ -4,38 +4,14 @@ import { computed, ref, watch, useSlots } from 'vue';
 import WootEditor from 'dashboard/components/widgets/WootWriter/Editor.vue';
 
 const props = defineProps({
-  modelValue: {
-    type: String,
-    default: '',
-  },
-  label: {
-    type: String,
-    default: '',
-  },
-  placeholder: {
-    type: String,
-    default: '',
-  },
-  focusOnMount: {
-    type: Boolean,
-    default: false,
-  },
-  maxLength: {
-    type: Number,
-    default: 200,
-  },
-  showCharacterCount: {
-    type: Boolean,
-    default: true,
-  },
-  disabled: {
-    type: Boolean,
-    default: false,
-  },
-  message: {
-    type: String,
-    default: '',
-  },
+  modelValue: { type: String, default: '' },
+  label: { type: String, default: '' },
+  placeholder: { type: String, default: '' },
+  focusOnMount: { type: Boolean, default: false },
+  maxLength: { type: Number, default: 200 },
+  showCharacterCount: { type: Boolean, default: true },
+  disabled: { type: Boolean, default: false },
+  message: { type: String, default: '' },
   messageType: {
     type: String,
     default: 'info',
@@ -43,6 +19,7 @@ const props = defineProps({
   },
   enableVariables: { type: Boolean, default: false },
   enableCannedResponses: { type: Boolean, default: true },
+  enabledMenuOptions: { type: Array, default: () => [] },
 });
 
 const emit = defineEmits(['update:modelValue']);
@@ -120,6 +97,7 @@ watch(
         :disabled="disabled"
         :enable-variables="enableVariables"
         :enable-canned-responses="enableCannedResponses"
+        :enabled-menu-options="enabledMenuOptions"
         @input="handleInput"
         @focus="handleFocus"
         @blur="handleBlur"