Umbau zu proxy: Appliances wie in spawn

Kern (Main, Config, Servers, Appliance) lädt die Appliances mute, chat und
tablist; weitere kommen in Main.APPLIANCES dazu. Plugin-ID und Datenordner
heißen jetzt proxy, Kanal craftattack:chat und chatbridge.muted bleiben.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

build.gradle

@@ -3,7 +3,7 @@ plugins {
 }
 
 group = 'eu.mhsl.craftattack'
-version = '1.2.0'
+version = '2.0.0'
 
 repositories {
     mavenCentral()
@@ -47,7 +47,7 @@ tasks.register('uploadPlugin') {
     doLast {
         def file = jar.archiveFile.get().asFile
         def checksum = file.bytes.digest('SHA-256')
-        def target = '/home/minecraft/velocity/plugins/chat-bridge.jar'
+        def target = '/home/minecraft/velocity/plugins/proxy.jar'
         providers.exec {
             commandLine 'scp', file.absolutePath, "minecraft@10.20.9.3:${target}.new"
         }.result.get()