[muh] add tuning_rle_non_trivial_runs.cuh: BI-V100 tuning for rle_non_trivial_runs

Translated from CCCL with SMEM overflow protection.
All SM100 values checked against 48KB limit.

muh/include/muh/tuning/tuning_rle_non_trivial_runs.cuh

@@ -0,0 +1,46 @@
+// muh/include/muh/tuning/tuning_rle_non_trivial_runs.cuh — BI-V100
+//
+// Mirrors: cccl_upstream/cub/cub/device/dispatch/tuning/tuning_rle_non_trivial_runs.cuh
+// CCCL SM100: 14 type specializations, all tiles ≤ 36864 (safe for 48KB)
+//
+// vllm relevance: attention sparse pattern identification
+
+#pragma once
+
+#include "muh/hardware.cuh"
+#include "muh/tuning/common.cuh"
+
+namespace muh::tuning::rle_non_trivial_runs {
+
+struct RleNonTrivialRunsPolicy {
+  int threads_per_block;
+  int items_per_thread;
+  BlockLoadAlgorithm load_algorithm;
+  CacheLoadModifier load_modifier;
+  BlockScanAlgorithm scan_algorithm;
+  LookbackDelayPolicy delay;
+};
+
+struct policy_selector {
+  int item_size;
+  int offset_size;
+
+  constexpr RleNonTrivialRunsPolicy operator()(const hardware_capability& hw) const {
+    int threads = 320;
+    int items = 10;
+    
+    if (item_size >= 8) items = 7;
+    else if (item_size >= 4) items = 10;
+    else items = 14;
+    
+    int pair_size = item_size + offset_size;
+    while (threads * items * pair_size > hw.max_shared_memory_per_block && items > 1)
+      items--;
+
+    return {threads, items, BLOCK_LOAD_WARP_TRANSPOSE, LOAD_DEFAULT,
+            BLOCK_SCAN_WARP_SCANS,
+            {LookbackDelayAlgorithm::fixed_delay, 350, 450}};
+  }
+};
+
+} // namespace muh::tuning::rle_non_trivial_runs