now i can install ADeck from the browser and use it more like a normal desktop app instead of opening the project files manually every time bczz i made adeck into an actual installable web app instead of having to open the html files manually every time

• added the web app manifest so ADeck can be installed like a normal app
• added the adeck app icons in different sizes including the maskable one
• added the service worker for the installed web app and connected the new setup with the existing adeck web interface without changing the main layout
• tested the installed version and checked that it opens as its own app instead of just another browser tab and also checked the existing profiles, settings and hardware preview after installing it so the old stuff still works