kosa8 v0.1.0

kosa8 v0.1.0 — developer preview.

macOS builds are signed with a Developer ID and notarized by Apple.
Windows builds are Authenticode-signed. Verify with checksums.txt.

Platform	Package	Contents
macOS arm64	*darwin_arm64.zip	kosa8 + kosa8d — full runtime
macOS amd64	*darwin_amd64.zip	kosa8 — the daemon is Apple Silicon only
Linux	.tar.gz .deb .rpm .apk	kosa8 + kosa8-guestd
Windows	*windows_*.zip	kosa8.exe

A non-macOS kosa8 cannot run containers locally. The daemon needs
Virtualization.framework, so those builds are remote clients: set
KOSA8_HOST and KOSA8_TOKEN to drive a macOS worker.

Known gaps are stated in BENCHMARKS.md rather than omitted.