Rename `Confirmer` resource to `ResConfirm`, `ConfirmerCount` to
`ConfirmCount`, and `ConfirmerPredicate` to `ConfirmPredicate`. Update
related setups, guards, and documentation references.

Add Confirmer with cached confirmation state and predicate-based
parsing for yes/no and true/false inputs. Add ConfirmerSetup to
register the resource and auto-confirm when skip mode is enabled.
Add StandardInputArgsSetup to read piped stdin as appended arguments.
Reorganize module exports in res and setups.

Mark all source files with a comment indicating they are not optimized
for documentation purposes.

Add four new resource types for common directory paths and a
convenience setup struct that registers all of them at once.