Cmake: add defconfig preprocess capability in Cmake build environment(recursively expand #include) #16897
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Closed the previous PR and opened this new PR to minimize the Cmake scripts change.....
Add:
cmake/nuttx_process_config.cmake
tools/process_config.py
Update nuttx/CMakeLists.txt to call process_config defined in nuttx_process_config.cmake to process defconfig before actually using it
Note: Please adhere to Contributing Guidelines.
Summary
Add deconfig "#include" expand capability in Cmake build system
Impact
Cmake build system will have the deconfig "#include" expand capability, which is also cross-platform
Testing
Split defconfig into two files:

Cmake Expand defconfig and generate .defconfig.processed: