Add nightly builds to main

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

build_pico_fido.sh

@@ -4,6 +4,8 @@ VERSION_MAJOR="5"
 VERSION_MINOR="12"
 
 rm -rf release/*
+mkdir -p build_release
+mkdir -p release
 cd build_release
 
 for board in 0xcb_helios \
@@ -96,7 +98,7 @@ for board in 0xcb_helios \
     wiznet_w5100s_evb_pico
 do
     rm -rf *
-    PICO_SDK_PATH=../../pico-sdk cmake .. -DPICO_BOARD=$board
+    PICO_SDK_PATH="${PICO_SDK_PATH:-../../pico-sdk}" cmake .. -DPICO_BOARD=$board
     make -kj20
     mv pico_fido.uf2 ../release/pico_fido_$board-$VERSION_MAJOR.$VERSION_MINOR.uf2