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_mutation_configure.go

@@ -260,6 +260,10 @@ func (r *mutationResolver) ConfigureInterface(ctx context.Context, input models.
 		c.Set(config.HandyKey, *input.HandyKey)
 	}
 
+	if input.FunscriptOffset != nil {
+		c.Set(config.FunscriptOffset, *input.FunscriptOffset)
+	}
+
 	if err := c.Write(); err != nil {
 		return makeConfigInterfaceResult(), err
 	}