RFC: Show crop aspect ratio in crop preview

[deekayhd]

Is your feature request related to a problem? Please describe.
This enhancement proposal originated from a suggestion on the pixls.us forum by user elGordo (Displaying freeform crop aspect ratio).

Describe the solution you'd like
In the crop module when adjusting the crop, the dimension of the crop area are displayed as x in the middle of the frame. The proposal is to also show the aspect ratio of the crop area, as shown in the screenshot:

Alternatives

Additional context
I already prepared pull request #20191, where a possible implementation can be checked,

[TurboGit]

Why not, but only for free crop otherwise I don't see the point.

[TurboGit]

Maybe not after all as we can trigger the crop from a shortcut and so a good way to remind the user of the current aspect ratio.