Modernize project: migrate to net.blockhost, add CI, metadata, and docs

- Migrate package from me.itskronx11 to net.blockhost across all modules
- Add MIT LICENSE and rewrite README with badges, features, and build instructions
- Add GitHub Actions CI (build.yml) and release automation (release.yml)
- Migrate MC module build files from Groovy to Kotlin DSL (build.gradle.kts)
- Update fabric.mod.json with proper metadata, contact info, and java >=21 dep
- Remove unused fabricApi configureDataGeneration block
- Add .editorconfig and root gradle.properties for shared config
- Set GitHub repo description

Co-Authored-By: Claude Opus 4.6 <[email protected]>

mc-1.21.8/src/main/java/net/blockhost/anarchymod/AnarchyMod.java

@@ -0,0 +1,21 @@
+package net.blockhost.anarchymod;
+
+import net.fabricmc.api.ClientModInitializer;
+import net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents;
+import net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking;
+import net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry;
+import net.minecraft.core.registries.BuiltInRegistries;
+
+public class AnarchyMod implements ClientModInitializer {
+
+    @Override
+    public void onInitializeClient() {
+        PayloadTypeRegistry.playC2S().register(JoinPayload.TYPE, JoinPayload.CODEC);
+        ClientPlayConnectionEvents.JOIN.register((listener, sender, client) -> {
+            if (client.getCurrentServer() != null && Domains.contains(client.getCurrentServer().ip))
+                sender.sendPacket(new JoinPayload());
+        });
+    }
+
+
+}