Fuzzing with NTFC

I wrote a fuzzer for NuttX that looks for build breaks by changing Kconfig options one by one.
I'm thinking of porting it to NTFC, so that all testing tools for NuttX are available in one tool.

Functions that could be added:
- fuzz Kconfig options and look for build breaks
- fuzz Kconfig options and run ostest
- fuzz Kconfig options and create memory usage reports

Review the existing NuttX fuzzer described in the issue and linked pull request #12, then compare the proposed integration with the three listed testing behaviors. Done should be an agreed, working NTFC integration with clear coverage for the selected Kconfig fuzzing, build-break, ostest, or memory-report workflows.

Written by the indexing model from the issue text.