[muh] add tuning_find.cuh: BI-V100 tuning header for find

Translated from CCCL cub/device/dispatch/tuning/tuning_find.cuh.
Uses hardware_capability dispatch instead of compute_capability.

muh/include/muh/tuning/tuning_find.cuh

@@ -0,0 +1,32 @@
+// muh/include/muh/tuning/tuning_find.cuh — BI-V100
+//
+// Mirrors: cccl_upstream/cub/cub/device/dispatch/tuning/tuning_find.cuh
+// CCCL: single policy, uses scale_mem_bound(128, 16, input_type_size)
+//
+// vllm relevance: EOS token detection in decode
+// SMEM risk: scale_mem_bound handles it
+
+#pragma once
+
+#include "muh/hardware.cuh"
+#include "muh/tuning/common.cuh"
+
+namespace muh::tuning::find {
+
+struct FindIfPolicy {
+  int threads_per_block;
+  int items_per_thread;
+  int vec_size;
+  CacheLoadModifier load_modifier;
+};
+
+struct policy_selector {
+  int input_type_size;
+
+  constexpr FindIfPolicy operator()(const hardware_capability& /*hw*/) const {
+    auto [items, threads] = scale_mem_bound(128, 16, input_type_size);
+    return {threads, items, 4, LOAD_LDG};
+  }
+};
+
+} // namespace muh::tuning::find