I'd like to add footprints for Cherry MX keyswitches. I think having an "official" footprint would be pretty useful for people who want to design their own mechanical keyboard or macro pad. Currently there are a few libraries floating around, but personally, I prefer to use as few custom/third party symbols and footprints as possible -- despite what I've heard about the current state of the libraries it seems perfectly fine for most common components.

There are a couple different variants of the switch, for example PCB mount vs. plate mount (PCB mount has two extra NPTHs on either side for stability), pads for LEDs and diodes, and extra holes for mounting stabilisers (eg. the space bar and shift keys). The number of new footprints probably calls for their own Buttons_Switches_Cherry.pretty repo.

Additionally, the mechanical keyboard community has a system for measuring the size of keys: 1u = 19.05mm pitch (sometimes 19mm, but the Cherry MX datasheet specifies the former). The alphanumeric keys for example are all 1u, and the ANSI enter key is 2.25u wide. But how would this be reflected in the footprint name? Perhaps something like:

SW_Cherry_MX1A_{1.00|1.25|...}u_{PCB|Plate}[_{LED|Diode}]

The LED and diode variants, being a single footprint, would need either their own schematic symbols (SW_SPST_LED exists already), markings for placement of pre-existing footprints, or would need to be split into separate footprints and overlaid.