Migrate from optparse-applicative-fork to optparse-applicative 0.19
Upstream now includes the prettyprinter switch (PR #428) and briefHangPoint formatter (PR #425), making the fork unnecessary. Two capabilities from the fork are not available in upstream: - prefRenderHelp: no hook to inject a custom renderer into the --help path - helpEmbedBriefDesc: replaced with the coarser briefHangPoint 35 The CLI_HELP_TRACE tracing (Ann/AnnTrace) is removed; it was never wired up. Golden tests will need updating due to formatting changes.