Move TechHider into new HiderCore module

HiderCore holds the TechHider, ChunkHider and AccessPrivilegeProvider so that
FightSystem and BauSystem can both shade it. BlockIds and ProtocolUtils stay in
SpigotCore (used by AntiNocom and RFallingBlockEntity) and move to
de.steamwar.core to avoid a split package. The access widener entries the
TechHider needs are duplicated into hidercore.accesswidener; the legacy
TechHider still needs its own copies in SpigotCore.

FightSystem/FightSystem_Core/build.gradle.kts

@@ -30,6 +30,7 @@ dependencies {
     compileOnly(libs.classindex)
     annotationProcessor(libs.classindex)
     compileOnly(project(":SpigotCore", "default"))
+    implementation(project(":HiderCore"))
 
     compileOnly(libs.netty)
     compileOnly(libs.paperapi)

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/record/PacketProcessor.java

@@ -20,6 +20,7 @@
 package de.steamwar.fightsystem.record;
 
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
+import de.steamwar.core.BlockIds;
 import de.steamwar.core.worldedit.WorldEditWrapper;
 import de.steamwar.entity.REntity;
 import de.steamwar.entity.REntityServer;
@@ -40,7 +41,6 @@ import de.steamwar.fightsystem.utils.TechHiderWrapper;
 import de.steamwar.sql.SchematicNode;
 import de.steamwar.sql.SteamwarUser;
 import de.steamwar.sql.Team;
-import de.steamwar.techhider.BlockIds;
 import net.md_5.bungee.api.ChatMessageType;
 import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.api.chat.TextComponent;

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/utils/Region.java

@@ -19,7 +19,7 @@
 
 package de.steamwar.fightsystem.utils;
 
-import de.steamwar.techhider.ProtocolUtils;
+import de.steamwar.core.ProtocolUtils;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import org.bukkit.Location;