mapsyncer-paper: server side of MapSyncer for Xaero's World Map, discovery-limited

Paper 26.2 plugin speaking the stock MapSyncer client mod's protocol.
Renders Xaero region zips from the world's region files, but only for chunks
players have actually been sent (PlayerChunkLoadEvent), seeded once from
InhabitedTime. Shared or per-player visibility, background render cycle,
per-player streaming with hash/timestamp skipping, Gitea Actions release
workflow.

Vendors the MCA parser and Xaero writer from upstream MapSyncer (GPL-3.0),
see NOTICE.md.

Claude-Session: https://claude.ai/code/session_011FePLXwBsCGLTzaSkk1Z6V

settings.gradle.kts

@@ -0,0 +1,8 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven("https://repo.papermc.io/repository/maven-public/")
+    }
+}
+
+rootProject.name = "mapsyncer-paper"