refactor: Reorganize assets

src/assets/css/3-base/_02-main.css

@@ -11,7 +11,7 @@ body {
   flex-direction: column;
   justify-content: center;
   min-height: 100%;
-  background: var(--color-tertiary) url("/img/dotgrid.png");
+  background: var(--color-tertiary) url("/assets/img/dotgrid.png");
   color: var(--color-light-text);
   font-family: var(--fontstack);
 

src/assets/css/4-modules/options.css

@@ -33,7 +33,7 @@
 
 .options__select {
   padding-right: 4.4rem;
-  background: url("/img/ico-arrow.svg") no-repeat;
+  background: url("/assets/img/ico-arrow.svg") no-repeat;
   background-position: calc(100% - 2rem) center;
 }
 

src/manifest.webmanifest

@@ -3,12 +3,12 @@
   "short_name": "Souvenir",
   "icons": [
     {
-      "src": "/img/icons/android-chrome-192x192.png",
+      "src": "/assets/img/icons/android-chrome-192x192.png",
       "sizes": "192x192",
       "type": "image/png"
     },
     {
-      "src": "/img/icons/android-chrome-512x512.png",
+      "src": "/assets/img/icons/android-chrome-512x512.png",
       "sizes": "512x512",
       "type": "image/png"
     }