Add disabling GPU altogether

Setting the layers to 0 seemed to do most of the work, but it still used
some of the available GPU. Which was weird. Let's see if this messes up
the CI test times.

src/plugins/local-llm-rename/llama.ts

@@ -21,7 +21,7 @@ export async function llama(opts: {
   model: string;
   disableGpu?: boolean;
 }): Promise<Prompt> {
-  const llama = await getLlama();
+  const llama = await getLlama({ gpu: opts.disableGpu ? false : "auto" });
   const modelOpts: LlamaModelOptions = {
     modelPath: getModelPath(opts?.model),
     gpuLayers: (opts?.disableGpu ?? IS_CI) ? 0 : undefined