feat: Move email attachments from links to file attachments (#11304)

Add ability to send files as attachments instead of links
Fixes: https://github.com/chatwoot/chatwoot/issues/1074


## Changes 
- `emaily_reply` : We will attach the small attachments as attachments
and large ones as links
- `reply_with_summary`, `conversation_transcript`,
`reply_with_out_summary` : We will change the attachment format to the
following instead of the previous `View the attachment here`

```
Attachments:
file_name
file_name2
```


---------

ref: https://github.com/chatwoot/chatwoot/pull/10318/files -> for fixing
: https://github.com/chatwoot/chatwoot/pull/9655#issuecomment-2183962550

---------

Co-authored-by: Marco Marinho <marcomarinho12@gmail.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>

app/mailers/conversation_reply_mailer.rb

@@ -1,4 +1,8 @@
 class ConversationReplyMailer < ApplicationMailer
+  # We needs to expose large attachments to the view as links
+  # Small attachments are linked as mail attachments directly
+  attr_reader :large_attachments
+
   include ConversationReplyMailerHelper
   default from: ENV.fetch('MAILER_SENDER_EMAIL', 'Chatwoot <accounts@chatwoot.com>')
   layout :choose_layout