[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/gm_commands/show/buffs.cpp

@@ -0,0 +1,11 @@
+#include "../../client.h"
+
+void ShowBuffs(Client *c, const Seperator *sep)
+{
+	Mob* t = c;
+	if (c->GetTarget()) {
+		t = c->GetTarget();
+	}
+
+	t->ShowBuffs(c);
+}