Inline Office attachment previews (DOCX, XLSX, PPTX) — client-side, without additional services

Hi @tommoor, and everyone! First of all, thank you for the amazing work on Outline! There's one feature I'd love to see: the ability to preview Word, Excel and PowerPoint attachments directly within Outline, without having to download and open them separately. I came across the earlier discussion #3542 and your concerns about rendering proprietary Office formats using open-source tools. That makes perfect sense, especially if it means introducing additional services or running a full office suite alongside Outline. I recently discovered a few interesting open-source projects that might offer a simpler approach, entirely within the browser, and thought they were worth sharing. What I have in mind Nothing as ambitious as an Office editor, just a convenient, read-only preview: • DOCX: Read documents with their text, tables, images and basic formatting. • XLSX: Browse spreadsheets, switch between worksheets and scroll through data. • PPT…