Test flight new designs for attachments preview on chat

[Korede612]

Pull Request Title

Allow drag and drop of multiple files https://github.com/stakwork/sphinx-mac/issues/413

Description

This pull request addresses the Allow drag and drop of multiple files in Issue https://github.com/stakwork/sphinx-mac/issues/413.

The following are the addressed issues:

• Allow dragging and dropping multiple files at a time
• The new attachments preview view should support up to 10 files

Changes Made

• NewChatMessageFieldView.swift:
  • Added property for keeping track of number of files attached
• NewChatMessageFieldView.swift:
  • Reduces the file counter property value by 1 for each close button tapped
• NewChatViewController+CollectionViewExtension.swift:
  • Updated the showPreview method to handle multiple file attachment
  • Updated the showVideoFilePreview method to handle multiple file attachment
• NewChatViewController.swift:
  • Added the totalFileDroppable property for limiting the number of file attachable
• DraggingDestinationView.swift:
  • Updated the processURLs method to handle multiple files upload at a time

Link to Recording

• https://www.loom.com/share/ae930f9ebe1c47b0a65ebd32c78643b1?sid=bbfe9c94-cb61-46f5-8371-2167e852ba50