Add upload progress bar / percentage loader for large files in the Files manager

[MuhammadNasir-dev]

• Current Behavior: When uploading files via the application's Files tab (container file explorer), a small generic spinner appears that says "Uploading file...", but there is no progress indicator, percentage, or estimated time remaining, especially for large

• files.Proposed Solution: Implement a progress bar (or percentage indicator) for file uploads so users can track the upload progress of larger files.