Add SDK test and reorganize repository

Dockerfile

@@ -0,0 +1,32 @@
+FROM alpine:3.16.2
+
+# Install toolchain
+RUN apk update && \
+    apk upgrade && \
+    apk add git \
+            python3 \
+            py3-pip \
+            cmake \
+            build-base \
+            libusb-dev \
+            bsd-compat-headers \
+            newlib-arm-none-eabi \
+            gcc-arm-none-eabi
+
+# Raspberry Pi Pico SDK
+ARG SDK_PATH=/usr/share/pico_sdk
+RUN git clone https://github.com/raspberrypi/pico-sdk $SDK_PATH && \
+    cd $SDK_PATH && \
+    git submodule update --init
+
+ENV PICO_SDK_PATH=$SDK_PATH
+
+# Picotool installation
+RUN git clone -b master https://github.com/raspberrypi/picotool.git /home/picotool && \
+    cd /home/picotool && \
+    mkdir build && \
+    cd build && \
+    cmake .. && \
+    make && \
+    cp /home/picotool/build/picotool /bin/picotool && \
+    rm -rf /home/picotool