feat: Add conversation delete feature (#11677)

<img width="1240" alt="Screenshot 2025-06-05 at 12 39 04 AM"
src="https://github.com/user-attachments/assets/0071cd23-38c3-4638-946e-f1fbd11ec845"
/>


## Changes

Give the admins an option to delete conversation via the context menu

- enable conversation deletion in routes and controller
- expose delete API on conversations
- add delete option in conversation context menu and integrate with card
and list
- implement store action and mutation for delete
- update i18n with new strings

fixes: https://github.com/chatwoot/chatwoot/issues/947

---------

Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>

app/controllers/api/v1/accounts/conversations_controller.rb

@@ -124,6 +124,12 @@ class Api::V1::Accounts::ConversationsController < Api::V1::Accounts::BaseContro
     @conversation.save!
   end
 
+  def destroy
+    authorize @conversation, :destroy?
+    ::DeleteObjectJob.perform_later(@conversation, Current.user, request.ip)
+    head :ok
+  end
+
   private
 
   def permitted_update_params