Add automatic build scripts.

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

build_pico_fido2.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+VERSION_MAJOR="6"
+VERSION_MINOR="6"
+NO_EDDSA=0
+SUFFIX="${VERSION_MAJOR}.${VERSION_MINOR}"
+#if ! [[ -z "${GITHUB_SHA}" ]]; then
+#    SUFFIX="${SUFFIX}.${GITHUB_SHA}"
+#fi
+
+mkdir -p build_release
+mkdir -p release
+rm -rf -- release/*
+cd build_release
+
+PICO_SDK_PATH="${PICO_SDK_PATH:-../../pico-sdk}"
+board_dir=${PICO_SDK_PATH}/src/boards/include/boards
+
+for board in "$board_dir"/*
+do
+    board_name="$(basename -- "$board" .h)"
+    rm -rf -- ./*
+    PICO_SDK_PATH="${PICO_SDK_PATH}" cmake .. -DPICO_BOARD=$board_name -DSECURE_BOOT_PKEY=../../ec_private_key.pem -DENABLE_EDDSA=1
+    make -j`nproc`
+    mv pico_fido2.uf2 ../release/pico_fido2_$board_name-$SUFFIX.uf2
+done