Fileloom: more formats + QR file handoff

Fileloom is a free, ad-free Android viewer for files that usually need separate apps: PDFs, EPUBs, Office/HWP, archives/comics, code/media, PSD/AI, and CAD/3D previews. This launch also adds Transferloom handoff: send the file you're viewing by QR or 5-word code, no account or server upload.