Search gets overly cluttered

[PhazonicRidley]

When searching for features within the docs (e.g i2c) search is bombarded with header files and only after scrolling down do you get the namespaces with the different implementations of the item you are searching for. However, you do not get just the class for example, having it so the first things that appear are a list of the classes (libhal base, libhal-lpc40xx, etc) would be very helpful for navigation reasons