[wip] Rework Shop

- Change strategy for content fetching
- Add a route per page instead of using __layout for all
- Change the behaviors of the posters section (add a carousel on small screens)
- Change Poster buttons styling and make interactions only for desktop

src/components/PageTransition.svelte

@@ -9,7 +9,7 @@
 
     onMount(async () => {
         // Disable when changing filters on /photos and shop?
-        if (!$page.query.get('country') && !$page.path.includes('/shop/poster')) {
+        if (!$page.query.get('country') && !$page.path.includes('/shop')) {
             await tick()
             setTimeout(() => {
                 // Scroll back to top between page transitions