Merge 'Epic Serial Bus' - USB Improvements

epicardium/FreeRTOSConfig.h

epicardium/cdcacm.c

epicardium/descriptors.h

epicardium/epicardium.h

epicardium/fs/filesystem_fat.c

epicardium/meson.build

epicardium/modules/filesystem.h

epicardium/modules/hardware.c

epicardium/modules/meson.build

epicardium/modules/serial.c

epicardium/modules/usb.c

epicardium/usb/cdcacm.c

epicardium/usb/cdcacm.h

epicardium/usb/descriptors.h

epicardium/usb/epc_usb.c

epicardium/usb/epc_usb.h

epicardium/usb/mass_storage.c

epicardium/usb/mass_storage.h