add combine script to make a monolithic bin that can be flashed at 0x0

it's based on https://github.com/arduino/nina-fw/blob/master/combine.py

libraries/WiFi/extra/combine.py

@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+
+import sys;
+
+booloaderData = open("bootloader.bin", "rb").read()
+partitionData = open("partition-table.bin", "rb").read()
+networkData = open("network_adapter.bin", "rb").read()
+
+# 0x0 bootloader.bin 0x8000 partition-table.bin 0x10000 network_adapter.bin
+
+
+# calculate the output binary size, app offset 
+outputSize = 0x10000 + len(networkData)
+if (outputSize % 1024):
+	outputSize += 1024 - (outputSize % 1024)
+
+# allocate and init to 0xff
+outputData = bytearray(b'\xff') * outputSize
+
+# copy data: bootloader, partitions, app
+for i in range(0, len(booloaderData)):
+	outputData[0x0000 + i] = booloaderData[i]
+
+for i in range(0, len(partitionData)):
+	outputData[0x8000 + i] = partitionData[i]
+
+for i in range(0, len(networkData)):
+	outputData[0x10000 + i] = networkData[i]
+
+
+outputFilename = "ESP32-C3.bin"
+if (len(sys.argv) > 1):
+	outputFilename = sys.argv[1]
+
+# write out
+with open(outputFilename,"w+b") as f:
+	f.seek(0)
+	f.write(outputData)