feat: add SVG icon and generate PNG icons

- Added a new SVG icon file for the application.
- Created a manifest.json file for the web app with relevant metadata.
- Introduced package-lock.json to manage dependencies.
- Implemented a script to generate PNG icons from the SVG source using sharp.

package.json

@@ -4,5 +4,8 @@
   "private": true,
   "scripts": {
     "start": "npx serve -l 8080 ."
+  },
+  "devDependencies": {
+    "sharp": "^0.34.5"
   }
 }