Included are the source kicad files, as well as a set of gerbers. minimum hole diameter on the microvias on the usb-c port is 0.25mm

The switch connects to TP1 and TP2, it is of the SPST(single pole, single throw) variety from ali-express, but any SPST switch should do the job. Links to some examples that can work are included below:

https://www.aliexpress.us/item/3256804718359582.html
https://www.aliexpress.us/item/3256804642765727.html
https://www.aliexpress.us/item/3256805086884883.html