Adding workflow for autobuild.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

workflows/autobuild.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+git submodule update --init --recursive
+sudo apt update
+sudo apt install -y cmake gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib
+git clone https://github.com/raspberrypi/pico-sdk
+cd pico-sdk
+git submodule update --init
+cd ..
+mkdir build
+cd build
+cmake -DPICO_SDK_PATH=../pico-sdk ..
+make