VibeSchem v0.3.0

• New name: VibeSchem, "AI builder for Minecraft". Plugin vibeschem@vibeschem, desktop
  extension vibeschem.mcpb. Coming from minecraft-schematic-lab? Uninstall it first (see the
  README); your builds stay in ~/.minecraft-schematic-lab.
• Windows support for the plugin: one launch command for every OS (scripts/start-server, with
  start-server.cmd on Windows), and Node is downloaded when missing, without admin rights.
• Ready for Anthropic's plugin directory: listing page (plugin/README.md), icon, privacy
  policy, documentation and support links, third-party notices.
• Security: build scripts run in a sandbox that can't reach Node; the local server answers only
  its own viewer (no DNS rebinding or cross-site requests) and binds to 127.0.0.1 only; a stray
  promise rejection no longer stops it; fastify, @fastify/static and the MCP SDK updated past their
  advisories; Node downloads pinned to v24.22.0 with SHA-256 sums; exports never overwrite a file.
  See SECURITY.md to report a problem.
• MCP tools carry titles and read-only/destructive annotations, and say they are for Minecraft.
• License: GNU AGPL v3 (AGPL-3.0-only) instead of MIT. The name and logo are reserved
  (TRADEMARKS.md). Versions up to 0.2.0 stay available under MIT.