feat(trigger): added working robust repartitioning trigger system

more work is needed to identify the most robust set of criteria to trigger on but the system is now very easy to exend, probe, and use.

src/include/gridfire/trigger/trigger_abstract.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "gridfire/trigger/trigger_result.h"
+
+#include <string>
+#include <unordered_map>
+
+namespace gridfire::trigger {
+    template <typename TriggerContextStruct>
+    class Trigger {
+    public:
+        virtual ~Trigger() = default;
+
+        virtual bool check(const TriggerContextStruct& ctx) const = 0;
+
+        virtual void update(const TriggerContextStruct& ctx) = 0;
+        virtual void reset() = 0;
+
+        virtual std::string name() const = 0;
+        virtual std::string describe() const = 0;
+        virtual TriggerResult why(const TriggerContextStruct& ctx) const = 0;
+
+        virtual size_t numTriggers() const = 0;
+        virtual size_t numMisses() const = 0;
+    };
+}