Remove release zip from git tracking

Binary release archives belong in GitHub Releases, not in git history.
The zip is available at: https://github.com/NoCoderRandom/WinUnix/releases/tag/v1.0

Author: web-flow

.gitignore

@@ -25,3 +25,6 @@ desktop.ini
 .vscode/
 *.suo
 *.user
+
+# Release archives (distributed via GitHub Releases, not git)
+releases/