Fix release package naming, source release compression

[mborgerson]

Bug Description

• Fix source release, compress more with xz: src.tar.gz → xemu-x.y.z.tar.xz, add top level dir
• Include version in binary releases, drop 'release': xemu-win-x86_64-release.zip → xemu-x.y.z-win-x86_64.zip

The reason they were named this way originally was to simplify linking to 'latest', but it would be nice to actually include the release version number in the package name for archiving. While we're at it, we should make the updater smarter.

Expected Behavior

n/a

xemu Version

n/a

System Information

No response

Additional Context

No response