Fixes the recurring 'Your local changes to Cargo.toml would be overwritten'
error on Windows pulls. Git-for-Windows defaults to core.autocrlf=true,
which made every text file appear modified vs the LF-stored versions.
'* text=auto eol=lf' in .gitattributes overrides autocrlf and forces a
stable LF checkout.
Also ignores Square*Logo.png, android/, ios/, 64x64.png, icon.png — these
are produced by 'pnpm tauri icon' but we ship only the canonical 5 files
(32, 128, 128@2x, .ico, .icns).
