Preserve native Windows paths for filesystem operations, command-line options,
and game icons. Complete Unicode handling in recursive file listings and file
logging, restore unmounting by host directory, and extend regression coverage.
Original implementation by Augusto Domingos (@AghastyGD); retain all five of
his PR commits and include the reviewed follow-up fixes.
Closes#714
Co-authored-by: Augusto Domingos <augustodomingosvasco@gmail.com>
LOGF/LOGF_COLOR always ran fmt::sprintf even when the output was discarded; at
emulator log volume the formatting alone costs frames. Add Log::IsSilent() and
short-circuit before formatting. Behavior-preserving on all platforms (it only
skips work whose result is thrown away); before init it reports non-silent so
early logs still print.
(cherry picked from commit 1749e0fc68ae4290055fb12f72c9bb4baf466190)
nmzik