Minor cleanup of RP2040 code post addition of Pico-PIO_USB

* Removed some compiler warnings, and cleaned out unnecessary warning suppression from CMake suppress_tinyusb_warnings()
* Made explicit family_configure_dual_usb_example() for DUAL mode examples as family_configure_target() may not generally be called multiple times for the same target

* Renamed library pico_pio_usb to tinyusb_picio_pio_usb to be clearer and avoid conflict if someone already has a pico_pio_usb in their project
* Added family_add_pico_pio_usb() method for adding Pico-PIO_SUB support to an existing example
* Allowed tinyusb_pico_pio_usb to be added to regular apps using the Pico SDK

src/portable/raspberrypi/rp2040/hcd_rp2040.c

@@ -537,7 +537,11 @@ bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet
     (void) rhport;
 
     // Copy data into setup packet buffer
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
     memcpy((void*)&usbh_dpram->setup_packet[0], setup_packet, 8);
+#pragma GCC diagnostic pop
 
     // Configure EP0 struct with setup info for the trans complete
     struct hw_endpoint *ep = _hw_endpoint_allocate(0);