Interactor implementation with keycallbacks

[lknknm]

Description

Since we already have an Input namespace and the OttWindow class with set callbacks for key inputs, these should be now expanded with keycallbacks using an interactor class. This will benefit the OttCamera class with a better dealing for inputs, as well as set new shortcuts for general purposes.

[lknknm]

After some research, I've been thinking about implementing the Interactor class with a command pattern.
That would probably be helpful to hold the application state and eliminate the huge switch cases/if conditionals that the current keyCallback implementation has.