Use PageTransition component on every route

- Scrolls back to top when mounting new page with a timeout of the delay
- Rename photo Viewer class
- Change Shop posters section text from p to label

src/utils/contants.ts

@@ -7,4 +7,5 @@ export const DELAY = {
 export const DURATION = {
     PAGE_IN: 400,
     PAGE_OUT: 400,
+    PAGE_DELAY: 600,
 }