Add CMake, Ninja, and Conan build system support

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

kernel/CMakeLists.txt

@@ -0,0 +1,79 @@
+# MetalOS Kernel CMakeLists.txt
+# Builds minimal kernel binary
+
+cmake_minimum_required(VERSION 3.16)
+
+project(MetalOS_Kernel C ASM)
+
+# Source files
+set(KERNEL_SOURCES
+    src/main.c
+)
+
+# Find all source files in subdirectories
+file(GLOB_RECURSE CORE_SOURCES "src/core/*.c")
+file(GLOB_RECURSE HAL_SOURCES "src/hal/*.c")
+file(GLOB_RECURSE DRIVER_SOURCES "src/drivers/*.c")
+file(GLOB_RECURSE SYSCALL_SOURCES "src/syscall/*.c")
+
+list(APPEND KERNEL_SOURCES 
+    ${CORE_SOURCES}
+    ${HAL_SOURCES}
+    ${DRIVER_SOURCES}
+    ${SYSCALL_SOURCES}
+)
+
+# Compiler flags for kernel
+set(KERNEL_CFLAGS
+    -Wall
+    -Wextra
+    -Werror
+    -ffreestanding
+    -fno-stack-protector
+    -mno-red-zone
+    -mcmodel=large
+    -O2
+)
+
+# Create object library
+add_library(kernel_obj OBJECT ${KERNEL_SOURCES})
+target_include_directories(kernel_obj PRIVATE include)
+target_compile_options(kernel_obj PRIVATE ${KERNEL_CFLAGS})
+
+# Create kernel binary
+add_executable(kernel_elf $<TARGET_OBJECTS:kernel_obj>)
+set_target_properties(kernel_elf PROPERTIES
+    OUTPUT_NAME metalos.elf
+    LINKER_LANGUAGE C
+)
+target_link_options(kernel_elf PRIVATE
+    -nostdlib
+    -T ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld
+)
+
+# Custom command to create flat binary
+add_custom_command(
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/metalos.bin
+    COMMAND ${CMAKE_OBJCOPY}
+        -O binary
+        $<TARGET_FILE:kernel_elf>
+        ${CMAKE_CURRENT_BINARY_DIR}/metalos.bin
+    DEPENDS kernel_elf
+    COMMENT "Creating kernel flat binary"
+    VERBATIM
+)
+
+# Custom target for the binary
+add_custom_target(kernel_bin ALL
+    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/metalos.bin
+)
+
+# Install target
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/metalos.bin
+    DESTINATION boot
+)
+
+# Print status
+message(STATUS "Kernel configuration:")
+message(STATUS "  Sources: ${KERNEL_SOURCES}")
+message(STATUS "  Output: metalos.bin")