refactor: register RoPE kernels and fusion outside ggml

src/core/ggml_extensions.h

@@ -0,0 +1,12 @@
+#ifndef __SD_CORE_GGML_EXTENSIONS_H__
+#define __SD_CORE_GGML_EXTENSIONS_H__
+
+#include "ggml-backend.h"
+
+void sd_ggml_register_extensions(ggml_backend_t backend);
+
+#ifndef SD_USE_UPSTREAM_GGML
+ggml_tensor* sd_ggml_rope_apply(ggml_context* ctx, ggml_backend_t backend, ggml_tensor* x, ggml_tensor* pe, bool interleaved);
+#endif
+
+#endif