Release v1.0.0.17

Extend timed for automated callers: silent, attribute lists and @a

Add an optional trailing silent argument to /attributioner timed that
suppresses the success message while still reporting errors. Add a second
form taking comma-separated attribute:amount:operation entries; every entry
is validated before any is applied and duplicate attributes are rejected.
The existing single-attribute form is unchanged.

Add the @a target, which applies to every online player outside the worlds
listed in the new timed-all-excluded-worlds config option. No eligible
players is a no-op. remove also accepts @a.

Replace the per-modifier scheduled tasks with stored expiry ticks checked by
one sweep task each tick. Tab completion covers @a, silent and the entry
list. Update the README with the new syntax, config option and an
automation example.

Bump Paper API to 26.3, WorldEdit to 7.4.6, WorldGuard to 7.0.20,
run-paper to 3.1.0 and the Gradle wrapper to 9.8.2.