Inheritance and override icons like in CLion

Type: Feature Request

It would be nice to have icons on lines which show the following, like in CLion:

• the method overrides another one (a hover would indicate the overridden method)
• the method is overridden somewhere (a hover would indicate all overriding methods)
• the class/struct inherits (an)other(s) (a hover would indicate all parents)
• the class/struct is inherited somewhere (a hover would indicate all childs)

This is basically the same feature request as this one but for C++.

An example on how it looks in CLion (not complete):

El issue no menciona archivos de implementación ni pruebas; primero lee la solicitud relacionada del servidor de lenguaje de Python (#1641) y los puntos de entrada de las funciones del editor de la extensión de C++. Se considera completado cuando se muestren iconos de línea para overrides, métodos sobrescritos, herencia y clases derivadas, con hovers que identifiquen los métodos o tipos correspondientes.