Fix CMake error: move -Wall directly to root CMakeLists.txt after project()

Co-authored-by: AarC10 <30483634+AarC10@users.noreply.github.com>

Author: Copilot

.github/STATIC_ANALYSIS.md

@@ -50,7 +50,7 @@ west build -b native_sim app/your-app -- -DSNIPPET=compiler-warnings
 
 ## Global Compiler Warnings
 
-All builds now include `-Wall` by default through the `cmake/CompilerWarnings.cmake` file.
+All builds now include `-Wall` by default through the root `CMakeLists.txt`.
 This ensures production code meets stricter quality standards.
 
 ## References

CMakeLists.txt

@@ -8,12 +8,12 @@ find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 
 project(Backplane-Flight-Computer)
 
-# Enable strict compiler warnings for all builds
-include(cmake/CompilerWarnings.cmake)
-
 zephyr_syscall_include_directories(include)
 
 zephyr_include_directories(include)
+
+# Enable strict compiler warnings for all builds
+zephyr_compile_options(-Wall)
 
 add_subdirectory(drivers)
 add_subdirectory(lib)