Support @Meta in the same context as e.g. @Viewport

[Legioth]

Add a repeatable @Meta annotation that can be used in the same locations as e.g. @Viewport.

Using this annotation, the custom tags defined in https://github.com/vaadin/beverage-starter-flow/blob/fd3807d63301436070e5a2a520fb352524163ae3/src/main/java/com/vaadin/starter/beveragebuddy/ApplicationServiceInitListener.java#L20-L23 could be set simply as this:

@Meta(name="apple-mobile-web-app-capable", content="yes")
@Meta(name="apple-mobile-web-app-status-bar-style", content="black")
public class MainLayout ...