Create file input pattern

[cehfisher]

Issue

Create accessible file input pattern based on Scott's pattern.

Example

https://scottaohara.github.io/a11y_styled_inputs/src/native-file/

[scottaohara]

FWIW i'm also looking to create a second variation of this, as though accessible, it's a bit odd because each browser implements a file upload differently, so having 1 UI for them, based on the native input can be a bit misleading.