chore: add CodeRabbit config

.coderabbit.yaml

@@ -0,0 +1,42 @@
+knowledge_base:
+  mcp:
+    # "auto" disables MCP for public repositories, so set it explicitly.
+    # This is what allows the DeepWiki MCP server to be used as review context.
+    usage: enabled
+
+reviews:
+  path_instructions:
+    - path: "src/main/java/**/*.java"
+      instructions: |
+        Minecraft 1.12.2 Forge mod (GTWoodProcessing / GTWP), an add-on for
+        GregTech CE: Unofficial (GTCEu, https://github.com/GregTechCEu/GregTech).
+        Optional integration with GregTech Food Option (GTFO).
+
+        GTCEu context — use DeepWiki (GregTechCEu/GregTech) to verify:
+        - Confirm GTCEu APIs, registries, recipe builders and material/OrePrefix usage
+          are used correctly, and that referenced methods/fields actually exist in the
+          pinned GTCEu version.
+        - Flag use of GTCEu internals that are not part of its public API when a public
+          equivalent exists.
+
+        Platform constraints (1.12.2 / Java 8 bytecode):
+        - Do NOT suggest Java APIs or language features unavailable on this platform
+          (e.g. `List.of`, records, switch expressions, text blocks).
+        - Do NOT suggest modern Minecraft/Forge APIs; this is the 1.12.2 Forge line.
+
+        Side boundary:
+        - Flag client-only types or `@SideOnly(Side.CLIENT)` members referenced from
+          common/server code paths — this crashes a dedicated server.
+
+        Module discovery:
+        - Modules are discovered via Forge's `ASMDataTable` at FML Construction
+          (`modules/ModuleManager.java`) — not bytecode rewriting. There is no
+          IFMLLoadingPlugin/ASM class transformer in this repo.
+
+        Optional integrations:
+        - GTFO integration must be gated (`Loader.isModLoaded()` or the module system's
+          dependency mechanism) so a missing GTFO cannot crash the game.
+
+        Build:
+        - `build.gradle` is auto-generated. Never edit it
+          (configure via `buildscript.properties` / `dependencies.gradle`).