feat(download): add Linux beta support

update link to new documentation

feat(download): add quick download icon for older releases

feat: add telemetry notice on download page

fix(download): clarify Windows is beta, not fully supported

feat(download): add Python SDK link for Linux users

fix: Windows download page improvements - Fix .msi.zip.sig being downloaded instead of .msi - Add Windows beta warning with admin privileges notice - Extract platform icons to external SVG files (white fill) - Add Beta badge on Windows platform card

feat: make Windows available, macOS Intel coming soon

feat: improve Release Notes display with cleaner parsing and anchor link

chore: comment out Release Notes section on Download page

fix: filter auto-generated release notes, show fallback message

feat: add platform support notices

feat: add release notes section to download page

Initial commit: Reachy Mini Website