Draft: [rough] add SD card filter

I am not a Ruby-ist or someone who has the time to create a test environment, but an SD card filter is something I would like to see.

Here is an example of the field in the LOS device data: https://github.com/LineageOS/lineage_wiki/blob/b39b79c73d2f4e41ba531ac22acff36e70667852/_data/devices/us996.yml#L30

I do not care much about the max size, just the presence of the SD card slot.

Hopefully this helps.