Add CFI document #355

Job	Run time
linux-native-ci-asm (ubuntu-latest)	1m 23s
linux-native-ci-asm (ubuntu-24.04-arm)	1m 19s
linux-native-ci-asm-chaos (ubuntu-24.04-arm)	1m 29s
linux-x86-deny	52s
linux-native-test-suite (ubuntu-24.04-arm)	3m 4s
linux-native-ci-asm-chaos (ubuntu-latest)	1m 33s
linux-native-test-suite (ubuntu-latest)	3m 13s
linux-x86-ci (ubuntu-24.04-arm)	1m 41s
linux-x86-ci-generated	13s
linux-x86-ci (ubuntu-latest)	1m 42s
windows-x86-ci-asm	3m 15s
macos-x86-ci-asm	1m 55s
linux-fuzz	4m 4s
linux-native-test-spawn (ubuntu-latest)	1m 35s
linux-arm-ci-asm	6m 55s
linux-native-test-spawn (ubuntu-24.04-arm)	1m 22s
linux-arm-test-suite	5m 27s
	41m 2s

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