chore: add CodeRabbit config

[tier940]

Successor to the removed Gemini Code Assist / Claude PR review setups.

knowledge_base.mcp.usage: enabled

The default auto disables MCP for public repositories. Since this repo is public, leaving it at the default would silently stop the DeepWiki MCP server from being used as review context.

reviews.path_instructions

This repo is a GregTech CE: Unofficial add-on. The instructions tell the reviewer to:

• verify GTCEu API/registry usage against DeepWiki (GregTechCEu/GregTech)
• respect the 1.12.2 / Java 8 platform
• check the mixin targets this repo actually has (betterbuilderswands, chisel, storagedrawers, tconstruct)

Confirmed via source before writing this: core/CoreMod.java implements IFMLLoadingPlugin, but getASMTransformerClass() returns an empty array — it only does early config-file setup, it does not actually transform bytecode (unlike GTExpert-Core, which has a real IClassTransformer). The instructions call this out explicitly so the reviewer does not assume ASM rewriting happens here.

[coderabbitai]

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: f86a4118-d11d-46e0-93a9-1c52c6628c0c

📥 Commits

Reviewing files that changed from the base of the PR and between 1d4bcd4 and b11d481.

📒 Files selected for processing (1)

• .coderabbit.yaml

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_{Comment @coderabbitai help to get the list of available commands.}