[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

common/servertalk.h

@@ -1824,6 +1824,11 @@ struct ServerOOCMute_Struct {
 	bool is_muted;
 };
 
+struct ServerZoneStatus_Struct {
+	char  name[64];
+	int16 admin;
+};
+
 #pragma pack()
 
 #endif