v5.3.0

SteaMidra v5.3.0

What's new:
• Fixed "Access Denied" error when launching Steam (proper admin detection)
• Major Auto-updater improvements for both Windows EXE and Linux AppImage
• Windows version now distributed as a clean ZIP folder (SteaMidra-5.3.0-windows.zip) instead of single-file EXE
• Faster startup and reduced antivirus false positives (pre-extracted _internal folder)

Full detailed changelog is in CHANGELOG.md