[Databuckets] Nested Databuckets Protections and Improvements (#4748)

* Check for valid JSON before using it

* Do not allow nested keys to set be set an expiration

* Prevent overwriting of existing object or array

* Nested deletion support

* Update data_bucket.cpp

* Test cases

* More test cases, fix

* Update databuckets.cpp

* Update databuckets.cpp

* Basic databucket tests

* Update databuckets.cpp

* Update databuckets.cpp

zone/zone_cli.h

@@ -11,6 +11,7 @@ public:
 	static bool RanConsoleCommand(int argc, char **argv);
 	static bool RanSidecarCommand(int argc, char **argv);
 	static bool RanTestCommand(int argc, char **argv);
+	static void DataBuckets(int argc, char **argv, argh::parser &cmd, std::string &description);
 	static void NpcHandins(int argc, char **argv, argh::parser &cmd, std::string &description);
 	static void NpcHandinsMultiQuest(int argc, char **argv, argh::parser &cmd, std::string &description);
 };