feat(policy): updateed policy system and added new reaction chains

Reacions chains now contain more information and are broken out in a more detailed fashion.

src/include/gridfire/utils/hashing.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstdint>
+#include <functional>
 
 #include "gridfire/exceptions/exceptions.h"
 #include "gridfire/reaction/reaction.h"
@@ -62,4 +63,10 @@ namespace gridfire::utils {
         return splitmix64(h);
     }
 
+    template <typename T>
+    std::size_t hash_combine(std::size_t seed, const T& v) {
+        std::hash<T> hasher;
+        seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
 }