feat: Adds the ability to resize the editor (#13916)

# Pull Request Template

## Description

This PR adds support for resizing the reply editor up to nearly half the
screen height. It also deprecates the old modal-based pop-out reply box,
clicking the same button now expands the editor inline. Users can adjust
the height using the slider or the expand button.


## Type of change

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

## How Has This Been Tested?

### Loom video
https://www.loom.com/share/be27e1c06d19475ab404289710b3b0da


## 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
- [ ] 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: Pranav <pranav@chatwoot.com>

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

@@ -16,10 +16,6 @@ defineProps({
     type: String,
     default: '',
   },
-  isPopout: {
-    type: Boolean,
-    default: false,
-  },
 });
 
 const emit = defineEmits([
@@ -69,7 +65,6 @@ const onSend = () => {
       :generated-content="generatedContent"
       :min-height="4"
       :enabled-menu-options="[]"
-      :is-popout="isPopout"
       @focus="onFocus"
       @blur="onBlur"
       @clear-selection="clearEditorSelection"