[cmake] changed app id from org.eden_emu.eden to dev.eden_emu.eden (#237)

it is better to match app id with website domain

Reviewed-on: #237
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: Guo Yunhe <i@guoyunhe.me>
Co-committed-by: Guo Yunhe <i@guoyunhe.me>

dist/dev.eden_emu.eden.desktop

@@ -10,7 +10,7 @@ Type=Application
 Name=Eden
 GenericName=Switch Emulator
 Comment=Nintendo Switch video game console emulator
-Icon=org.eden_emu.eden
+Icon=dev.eden_emu.eden
 TryExec=eden
 Exec=eden %f
 Categories=Game;Emulator;Qt;