TaCZ VR: Unofficial Port

TaCZ VR 1.3.8 - Unofficial NeoForge 1.21.1 Port 2

- Completely removed the upstream automatic updater and external file-download code. These were disabled in port 1 but their classes were still packaged.
- Removed the update screen, JAR-replacement helper, unused updater setting and updater translations.
- Removed the obsolete Forge-only self-test harness from the source distribution.
- Updates are now installed manually through CurseForge. The addon's own models, textures, sounds, recipes and tags remain bundled in its JAR.
- Gameplay classes and supplied gameplay assets are unchanged from port 1. Original MIT license and credits are preserved.

Validation: build passed; dedicated server with TaCZ, Vivecraft and Simple Voice Chat reached Done and stopped cleanly; development client reached its title screen and exited cleanly. Packaged JAR and source archive audited for removal of the updater.

Requires Minecraft 1.21.1, Java 21, NeoForge 21.1.233+, TaCZ NeoForge 1.1.8-hotfix-r6 and Vivecraft 1.21.1-1.3.15-neoforge. Tested optional Simple Voice Chat version: 2.6.24.

Install the same addon version on the server and every client. This remains a public beta; headset gameplay has not been verified by the port maintainer.