Add script offset / delay to Handy support. (#1573)

* Add script offset / delay to Handy support.

Further work on  #1376.

Offsets are added to the current video position, so a positive value leads to earlier motion.  (The most common setting.)

This is needed because most script times have a consistent delay when compared to the video. (Delay from the API calls to the server should be handled by the server offset calculation.)

* Rename scriptOffset to funscriptOffset
* Correct localisation keys

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

pkg/api/resolver_query_configuration.go

@@ -109,6 +109,7 @@ func makeConfigInterfaceResult() *models.ConfigInterfaceResult {
 	language := config.GetLanguage()
 	slideshowDelay := config.GetSlideshowDelay()
 	handyKey := config.GetHandyKey()
+	scriptOffset := config.GetFunscriptOffset()
 
 	return &models.ConfigInterfaceResult{
 		MenuItems:           menuItems,
@@ -123,6 +124,7 @@ func makeConfigInterfaceResult() *models.ConfigInterfaceResult {
 		Language:            &language,
 		SlideshowDelay:      &slideshowDelay,
 		HandyKey:            &handyKey,
+		FunscriptOffset:     &scriptOffset,
 	}
 }