Update web manifest to include screenshots and new icons

[xPaw]

• The Lounge version: v4.4.0

Chrome devtools display the following warnings:

• Richer PWA Install Ul won't be available on desktop. Please add at least one screenshot with the "form_factor" set to "wide".
• Richer PWA Install Ul won't be available on mobile. Please add at least one screenshot for which "form_factor" is not set or set to a value other than "wide".
• Declaring an icon with 'purpose: "any maskable" is discouraged. It is likely to look incorrect on some platforms due to too much or too little padding.
• Actual size (150×150)px of lcon img/logo-grey-bg.svg does not match specified size (513×513px)

[ASFAR2023]

cheek this
https://web.dev/articles/add-manifest?hl=ar#:~:text=forecast%20information%22%2C-,%22screenshots%22%3A%20%5B,-%7B%0A%C2%A0%20%C2%A0%20%C2%A0%20%22src

"screenshots": [
   {
     "src": "/images/screenshot1.png",
     "type": "image/png",
     "sizes": "540x720",
     "form_factor": "narrow"
   },
   {
     "src": "/images/screenshot2.jpg",
     "type": "image/jpg",
     "sizes": "720x540",
     "form_factor": "wide"
   }
 ]

[jstjnsn]

Made a PR, please let me know if you approve of these changes.