Feature Request & Bug Fixes: Binary file support, raw/rendered toggle, and rendering performance

[raheemuddin786]

I'd like to propose a few enhancements and fixes to the version history diff views:

1. Binary file support: Currently, attempting to diff binary files (like images) doesn't render them visually. It would be great to have side-by-side previews for images and basic metadata fallbacks for other binary types.
2. View toggle: Add a toggle bar to switch between the rendered markdown view and the raw diff view.
3. Performance optimizations: Large files can freeze the UI when calculating diffs. We can resolve this by:
   • Deferring the heavy synchronous computation using setTimeout to yield to the browser's paint cycle.
   • Setting matching: 'none' in diff2html config to avoid expensive line matching algorithms on large diffs.
   • Disabling drawFileList in the config to hide the redundant file header.

I already have these changes fully implemented, tested, and ready to submit in a PR. Let me know if it's okay to open the PR for this!

Attached the reference output images:

[raheemuddin786]

Created the PR wrt this Request:
#42