Add ADR for command-line option handling best practices #11389

Job	Run time
check-ubuntu-24_04-make-gcc	30m 38s
check-ubuntu-24_04-make-clang	25m 19s
check-ubuntu-24_04-make-clang-smt-z3	6m 28s
check-ubuntu-24_04-cmake-gcc	29m 9s
check-ubuntu-22_04-make-clang	17m 46s
check-ubuntu-24_04-cmake-gcc-KNOWNBUG	17m 8s
check-ubuntu-24_04-arm-cmake-gcc	12m 16s
check-ubuntu-22_04-cmake-gcc-32bit	16m 18s
check-ubuntu-24_04-cmake-gcc-THOROUGH	22m 4s
check-macos-15-intel-make-clang	1h 9m 26s
check-docker-image	18m 38s
check-macos-14-cmake-clang	2h 2m 4s
windows-msi-package	24m 45s
check-vs-2025-cmake-build-and-test	57m 24s
include-what-you-use	12m 33s
check-vs-2022-make-build-and-test	44m 42s
check-ubuntu-24_04-cmake-gcc-14	15m 9s
check-ubuntu-22_04-cmake-gcc	16m 40s
check-string-table	1m 43s
	9h 20m 10s

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