Aurora SpotiRip desktop and web app

- Spotify playlist, library, album and artist browsing with in-app playback
- Song, playlist and album downloads via spotdl with YouTube and Bandcamp fallbacks
- Electron desktop app (castLabs Widevine) with a permanent sidebar layout
- Linux and Windows packaging scripts

components/Skeleton.module.css

@@ -0,0 +1,46 @@
+@layer base {
+  .skeleton {
+    position: relative;
+    overflow: hidden;
+    background-color: var(--muted);
+    border-radius: var(--radius);
+    width: 100%;
+    height: 1rem;
+  }
+
+  .skeleton::after {
+    content: "";
+    position: absolute;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    left: 0;
+    transform: translateX(-100%);
+    background-image: linear-gradient(
+      90deg,
+      transparent,
+      rgba(255, 255, 255, 0.4),
+      transparent
+    );
+    animation: shimmer 2s infinite;
+  }
+
+  @keyframes shimmer {
+    100% {
+      transform: translateX(100%);
+    }
+  }
+
+  :global(.dark) .skeleton {
+    background-color: var(--muted);
+  }
+
+  :global(.dark) .skeleton::after {
+    background-image: linear-gradient(
+      90deg,
+      transparent,
+      rgba(255, 255, 255, 0.05),
+      transparent
+    );
+  }
+}