add ClientModInitializer

Author: TexBlock

src/main/java/org/thinkingstudio/bedsheet/loader/entrypoint/ClientModInitializer.java

@@ -0,0 +1,7 @@
+package org.thinkingstudio.bedsheet.loader.entrypoint;
+
+import net.neoforged.fml.IExtensionPoint;
+
+public interface ClientModInitializer extends IExtensionPoint {
+    void onInitializeClient();
+}

src/main/java/org/thinkingstudio/bedsheet/loader/entrypoint/EntrypointHandler.java

@@ -14,6 +14,10 @@ public static void init() {
                 Optional<DedicatedServerModInitializer> serverModInitializer = modContainer.getCustomExtension(DedicatedServerModInitializer.class);
                 serverModInitializer.ifPresent(DedicatedServerModInitializer::onInitializeServer);
             }
+            if (FMLLoader.getDist().isClient()) {
+                Optional<ClientModInitializer> clientModInitializer = modContainer.getCustomExtension(ClientModInitializer.class);
+                clientModInitializer.ifPresent(ClientModInitializer::onInitializeClient);
+            }
         });
     }
 }