Pulls the 597-line block of printf calls that emits the --help
text out of main.cpp into its own translation unit. printUsage
is the longest single function in main.cpp by far and was pure
boilerplate (no logic, just a flat list of help lines).
Function moved verbatim to wowee::editor::cli::printUsage; all
6 in-tree callers (--list-commands, --info-cli-stats,
--info-cli-categories, --info-cli-help, --validate-cli-help,
and the bare --help/-h handler) updated to the namespaced name.
The CLI-meta commands continue to capture printUsage's stdout
the same way, so behavior is identical (verified by re-running
--validate-cli-help, --info-cli-stats, --list-commands).
main.cpp drops 26,650 → 26,286 lines (-364 net; -597 from the
removal, +233 from the include and namespace-prefixing the
six call sites... wait, no, +6). Actually main.cpp net delta
matches the body extraction.
