feat: Add an uninstall script and make systemctl commands in the install script more robust.

install.sh

@@ -6,8 +6,8 @@ set -e
 echo "Building Toak Native AOT executable..."
 dotnet publish -c Release -r linux-x64
 
-systemctl --user stop toak.service
-systemctl --user disable toak.service
+systemctl --user stop toak.service >/dev/null 2>&1 || true
+systemctl --user disable toak.service >/dev/null 2>&1 || true
 echo "Installing to /usr/bin/toak... (This may prompt for your sudo password)"
 sudo cp bin/Release/net10.0/linux-x64/publish/Toak /usr/bin/toak