Move OnConVarChanged into a global hook.

core/provider.h

@@ -28,6 +28,7 @@
 #define _INCLUDE_SOURCEMOD_CORE_PROVIDER_IMPL_H_
 
 #include "logic/intercom.h"
+#include "GameHooks.h"
 #include <amtl/os/am-shared-library.h>
 
 class CoreProviderImpl : public CoreProvider
@@ -40,6 +41,9 @@ public:
 	bool LoadBridge(char *error, size_t maxlength);
 	void ShutdownBridge();
 
+	void InitializeHooks();
+	void ShutdownHooks();
+
 	// Provider implementation.
 	ConVar *FindConVar(const char *name) override;
 	const char *GetCvarString(ConVar *cvar) override;
@@ -61,6 +65,7 @@ public:
 private:
 	ke::Ref<ke::SharedLib> logic_;
 	LogicInitFunction logic_init_;
+	GameHooks hooks_;
 };
 
 extern CoreProviderImpl sCoreProviderImpl;