feat(web): improve slideshow quality of life (#18778)

* Add a new setting to toggle autoplay when showing the slideshow.
* Fix an issue where the slideshow would restart automatically when
navigating after it was paused.
* Add a keyboard shortcut 's' to start the slideshow from the asset
viewer.
* Add a keyboard shortcut ' ' to toggle the slideshow play/paused.
* Change the timeout for hiding the slideshow controls from 10 to 2.5
seconds.
* Add English translation for the 'autoplay_slideshow' setting.

Co-authored-by: Alex <alex.tran1502@gmail.com>

web/src/lib/stores/slideshow.store.ts

@@ -39,6 +39,7 @@ function createSlideshowStore() {
   const showProgressBar = persisted<boolean>('slideshow-show-progressbar', true);
   const slideshowDelay = persisted<number>('slideshow-delay', 5, {});
   const slideshowTransition = persisted<boolean>('slideshow-transition', true);
+  const slideshowAutoplay = persisted<boolean>('slideshow-autoplay', true, {});
 
   return {
     restartProgress: {
@@ -69,6 +70,7 @@ function createSlideshowStore() {
     slideshowDelay,
     showProgressBar,
     slideshowTransition,
+    slideshowAutoplay,
   };
 }