🔥 Huge style refactoring by using SvelteKit built-in style tag

It's been tricky but got there finally! Hello `:global`
- Avoid using one global CSS file containing everything
- Import the component SCSS file in a script tag from the component file to allow style scoping and including it only when used

src/style/atoms/_button-cart.scss

@@ -7,12 +7,12 @@
         margin-left: auto;
     }
 
-    button {
+    :global(button) {
         overflow: visible;
     }
 
     // Icon
-    svg {
+    :global(svg) {
         display: block;
         width: min(65%, 27px);
         height: min(65%, 27px);