Add Kernels namespace

include/kernels/matmul.cuh

@@ -0,0 +1,23 @@
+#ifndef MATMUL_H
+#define MATMUL_H
+
+namespace Kernels {
+
+__global__ void mat_vec_mul(
+    const float* d_matrix,
+    const float* d_vector,
+    float*       d_output,
+    int          w,
+    int          h
+);
+
+__global__ void vec_vec_add(
+    const float* d_vector1,
+    const float* d_vector2,
+    float*       d_output,
+    int          w
+);
+
+}  // namespace Kernels
+
+#endif  // MATMUL_H