refactor: rename package net.mcreator.customoregen -> com.aulyrius.customoregen

Final step of the MCreator purge. The MODID (custom_ore_gen) and all
registry names are unchanged, so existing worlds/saves are unaffected:
data JSONs reference the MODID, never the Java package. Updated the
mixin config package and the OresCommandTest package assertion.

AGENTS.md

@@ -36,12 +36,12 @@ Use the Gradle wrapper for all operations. Ensure you are using Java 21 (NeoForg
 
 - **Run Single Test Class:**
   ```bash
-  ./gradlew test --tests "net.mcreator.customoregen.OresCommandTest"
+  ./gradlew test --tests "com.aulyrius.customoregen.OresCommandTest"
   ```
 
 - **Run Single Test Method:**
   ```bash
-  ./gradlew test --tests "net.mcreator.customoregen.OresCommandTest.testCommandRegistration_ShouldRegisterOresCommand"
+  ./gradlew test --tests "com.aulyrius.customoregen.OresCommandTest.testCommandRegistration_ShouldRegisterOresCommand"
   ```
 
 - **Clean Project:**
@@ -72,14 +72,14 @@ The project was originally generated by MCreator but is no longer maintained wit
 - **Methods:** camelCase (e.g., `queueServerWork`).
 - **Constants:** UPPER_SNAKE_CASE (e.g., `MODID`, `COLD_BIOMES_TAG`).
 - **Fields:** camelCase (e.g., `workQueue`, `oreGenConfig`).
-- **Packages:** `net.mcreator.customoregen` (lowercase).
+- **Packages:** `com.aulyrius.customoregen` (lowercase).
 
 ### Imports
 - Group imports in this specific order:
   1. Java/Standard Libraries (`java.*`, `javax.*`)
   2. Third-party Libraries (e.g., `org.apache.logging.log4j.*`)
   3. Minecraft/NeoForge (`net.minecraft.*`, `net.neoforged.*`)
-  4. Project Classes (`net.mcreator.customoregen.*`)
+  4. Project Classes (`com.aulyrius.customoregen.*`)
 - Avoid `import *` unless there are many imports from the same package (e.g., `java.util.*` is acceptable if heavily used, but explicit imports are preferred for clarity).
 
 ### Logging
@@ -96,10 +96,10 @@ The project was originally generated by MCreator but is no longer maintained wit
 - **Event Bus:**
   - The `@Mod` class registers the `IEventBus`.
   - Use `@SubscribeEvent` for event handling.
-  - Event handlers often reside in `net.mcreator.customoregen.event` or static inner classes annotated with `@EventBusSubscriber`.
+  - Event handlers often reside in `com.aulyrius.customoregen.event` or static inner classes annotated with `@EventBusSubscriber`.
 
 - **Configuration:**
-  - Located in `net.mcreator.customoregen.config.ModConfigs`.
+  - Located in `com.aulyrius.customoregen.config.ModConfigs`.
   - Uses `ModConfig.Type.COMMON` built with `ModConfigSpec`.
   - Access configs via the public static fields (e.g., `ModConfigs.ORE_GEN.shardDiamondOreCount.get()`).