🎨 Isolate infra and ui components

The src/base.rs is still to be reworked.

src/ui/components/wallpaper.scss

@@ -0,0 +1,21 @@
+@import "../_base.scss"
+
+.wallpaper {
+    height: 100%;
+    width: 100%;
+    z-index: -1;
+
+    display: flex;
+    align-items: center;
+    justify-content: center;
+
+    overflow: hidden;
+
+    &__content {
+        background-image: url("./images/wallpaper-pattern.svg");
+        background-position: center;
+
+        width: 150%;
+        height: 150%;
+    }
+}