Add an info panel to the MediaDialog to show the user information
about the chosen file from the new extmetadata API.
Also, change the way results are viewed:
* Present the search results with their proper ratio.
* Use masonry fit for the search results.
* Change the resizeToBoundingBox method in ve.dm.MWImageNode to accept
a specific side constraint, either 'width' or 'height'. This is also
going to be useful for adding and calculating 'scale' considerations
that affects the image height.
* Add info panel with details from extmetadata including author, license,
date of upload and creation, etc.
* Get descriptions and data according to wiki language.
Bug: T78161
Bug: T74061
Change-Id: I7b4d019825aa89dd178665bd9492a07af15954ac
