Server Shutdown Alert

1.0.0-beta.1

• First standalone public beta, extracted from the server-specific shutdown alert utility.
• Warns online players before an ordinary main-thread dedicated-server stop; resumes the native stop after a configurable grace period.
• Uses existing vanilla sound and chat packets, with no bundled audio or client installation.
• Adds server settings for grace period, message, sound, volume and pitch. Defaults to five seconds and a vanilla bell chime.
• Keeps bypass paths immediate and repeated requests within one countdown. Notification failure leaves the original stop available.
• Verified native Sponge application, unrelated-method preservation, client no-op, packet codec and AutoModpack server-only classification. Gameplay and audible playback remain unverified.