[Commands] Consolidate #show commands into a singular #show command (#3478)

* [Cleanup] Consolidate #show commands into a singular #show command

# Notes
- All `#show` commands like `#showbuffs` are now subcommands of `#show`.
- All aliases like `#showbuffs` still function.

* Push up progress.

* Final push.

* Cleanup.

* Update ip_lookup.cpp

* emotes not emote

* Cleanup

* Update servertalk.h

* Update show.cpp

* Fix

* Final push.

* #aggro

* #who

zone/entity.h

@@ -553,7 +553,7 @@ public:
 		bool add_self_to_other_lists = false
 	);
 
-	void GetTrapInfo(Client* client);
+	void GetTrapInfo(Client* c);
 	bool IsTrapGroupSpawned(uint32 trap_id, uint8 group);
 	void UpdateAllTraps(bool respawn, bool repopnow = false);
 	void ClearTrapPointers();