feat: fabric entrypoint for refined storage platform api

refinedstorage2-platform-api/src/main/java/com/refinedmods/refinedstorage2/platform/api/RefinedStoragePlugin.java

@@ -0,0 +1,8 @@
+package com.refinedmods.refinedstorage2.platform.api;
+
+import org.apiguardian.api.API;
+
+@API(status = API.Status.STABLE, since = "2.0.0-milestone.3.13")
+public interface RefinedStoragePlugin {
+    void onPlatformApiAvailable(PlatformApi platformApi);
+}

refinedstorage2-platform-fabric/src/main/java/com/refinedmods/refinedstorage2/platform/fabric/ModInitializerImpl.java

@@ -1,6 +1,7 @@
 package com.refinedmods.refinedstorage2.platform.fabric;
 
 import com.refinedmods.refinedstorage2.platform.api.PlatformApi;
+import com.refinedmods.refinedstorage2.platform.api.RefinedStoragePlugin;
 import com.refinedmods.refinedstorage2.platform.common.AbstractModInitializer;
 import com.refinedmods.refinedstorage2.platform.common.PlatformProxy;
 import com.refinedmods.refinedstorage2.platform.common.content.BlockEntities;
@@ -57,6 +58,7 @@
 
 import java.util.Arrays;
 import java.util.HashSet;
+import java.util.List;
 import java.util.function.Function;
 import java.util.function.Predicate;
 
@@ -72,6 +74,7 @@
 import net.fabricmc.fabric.api.transfer.v1.fluid.FluidStorage;
 import net.fabricmc.fabric.api.transfer.v1.item.InventoryStorage;
 import net.fabricmc.fabric.api.transfer.v1.item.ItemStorage;
+import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.core.Registry;
 import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.world.Container;
@@ -102,6 +105,7 @@
 
 public class ModInitializerImpl extends AbstractModInitializer implements ModInitializer {
     private static final Logger LOGGER = LoggerFactory.getLogger(ModInitializerImpl.class);
+    private static final String PLUGIN_ENTRYPOINT_KEY = "refinedstorage_plugin";
 
     @Override
     public void onInitialize() {
@@ -124,6 +128,11 @@ public void onInitialize() {
         registerWrenchingEvent();
         registerSecurityBlockBreakEvent();
 
+        final List<RefinedStoragePlugin> pluginEntrypoints = FabricLoader.getInstance()
+            .getEntrypoints(PLUGIN_ENTRYPOINT_KEY, RefinedStoragePlugin.class);
+        LOGGER.debug("Loading {} Refined Storage plugin entrypoints.", pluginEntrypoints.size());
+        pluginEntrypoints.forEach(plugin -> plugin.onPlatformApiAvailable(PlatformApi.INSTANCE));
+
         LOGGER.debug("Refined Storage 2 has loaded.");
     }