Better support for file previews

We've added support for more file previews. Here's a rundown of what was added:
Graphic formats
: AI, PSD, PDF (thumbnail fix), AVIF, ICO, DNG
Docs and spreadsheets
: XLSX, XLS, XLSB, DOCX, DOC
Audio formats
: MP3, OPUS, OGG, WAV, AAC, M4A, FLAC
Shared document previews
Autogenerated link previews for sharing your Indy documents have been improved. The updated previews provide your clients with a more accurate representation of your document, making it easier and more efficient to share!