Add full automotive RTOS project

Add kernel (Cortex-M0/M3/M4, Tricore, S32K, RISC-V ports), drivers,
middleware (CAN stack, diagnostics, safety), applications, board
support, build/test tooling, and documentation.

build_test.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Project root
+PROJECT_ROOT="$(pwd)"
+
+# Toolchain paths (adjust based on your system)
+TOOLCHAIN_BIN="/opt/homebrew/bin"
+NEWLIB_INCLUDE="/opt/homebrew/opt/arm-none-eabi-newlib/arm-none-eabi/include"
+GCC_INCLUDE="/opt/homebrew/Cellar/arm-none-eabi-gcc/16.2.0/lib/gcc/arm-none-eabi/16.2.0/include"
+
+# Project include paths
+INCLUDE_PATHS=(
+    "-I${PROJECT_ROOT}/kernel/include"
+    "-I${PROJECT_ROOT}/drivers/include"
+    "-I${PROJECT_ROOT}/middleware"
+    "-I${PROJECT_ROOT}/middleware/can_stack/include"
+    "-I${PROJECT_ROOT}/middleware/diagnostics/include"
+    "-I${PROJECT_ROOT}/config"
+    "-I${NEWLIB_INCLUDE}"
+    "-I${GCC_INCLUDE}"
+)
+
+# Test compilation
+echo "Testing compilation..."
+arm-none-eabi-gcc \
+    -mcpu=cortex-m4 \
+    -mthumb \
+    -O0 \
+    -g \
+    -Wall \
+    -Wextra \
+    "${INCLUDE_PATHS[@]}" \
+    -c kernel/src/kernel_init.c \
+    -o test.o
+
+if [ $? -eq 0 ]; then
+    echo "✓ Compilation successful!"
+    rm -f test.o
+else
+    echo "✗ Compilation failed"
+    exit 1
+fi