Add a working `xmake run` command for Sonata.

The latest (v0.2.0 or later) Sonata RPi firmware can load a UF2 file
from the USB flash device, eliminating the need for any loader tooling
installed on the host.

This adds a script that:

 - Builds the UF2 image
 - Tries to determine where the Sonata board's filesystem is mounted
 - Copies it there if it can
 - Tells you where the file is and asks you to copy it manually if not.

scripts/run-sonata.sh

diff --git a/scripts/run-sonata.sh b/scripts/run-sonata.sh
new file mode 100755
index 0000000..e9e96d9
--- /dev/null
+++ b/scripts/run-sonata.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -ue
+
+FIRMWARE_ELF=$1
+
+SCRIPT_DIRECTORY="$(dirname "$(realpath "$0")")"
+. ${SCRIPT_DIRECTORY}/includes/helper_find_llvm_install.sh
+
+OBJCOPY=$(find_llvm_tool_required llvm-objcopy)
+
+command -v uf2conv > /dev/null
+if [ ! $? ] ; then
+	echo "uf2conv not found.  On macOS / Linux systems with Python3 installed, you can install it with:"
+	echo "python3 -m pip install --pre -U git+https://github.com/makerdiary/uf2utils.git@main"
+fi
+
+# Convert the ELF file to a binary file
+${OBJCOPY} -O binary ${FIRMWARE_ELF} ${FIRMWARE_ELF}.bin
+# Convert the binary to a UF2 (Microsoft USB Flashing Format) file
+uf2conv ${FIRMWARE_ELF}.bin -b0x00101000 -co ${FIRMWARE_ELF}.uf2
+
+# Try to copy the firmware to the SONATA drive, if we can find one.
+try_copy()
+{
+	if [ -f $1/SONATA/OPTIONS.TXT ] ; then
+		cp ${FIRMWARE_ELF}.uf2 $1/SONATA/firmware.uf2
+		echo "Firmware copied to $1/SONATA/"
+		exit
+	fi
+}
+
+# Try some common mount points
+try_copy /Volumes/
+try_copy /run/media/$USER/
+try_copy /run/media/
+try_copy /mnt/
+
+echo "Please copy $(pwd)/${FIRMWARE_ELF}.uf2 to the SONATA drive to load."

sdk/boards/sonata.json

diff --git a/sdk/boards/sonata.json b/sdk/boards/sonata.json
index 9b9b409..7d8433a 100644
--- a/sdk/boards/sonata.json
+++ b/sdk/boards/sonata.json
@@ -50,5 +50,6 @@
     "timer_hz" : 30000000,
     "tickrate_hz" : 100,
     "revoker" : "software",
+    "simulator" : "${sdk}/../scripts/run-sonata.sh",
     "simulation": false
 }