[Commands] Cleanup #ai Command. (#1980)

- Cleanup messages and logic.
- Remove #ai start/#ai stop as they can crash zones and are mostly useless.
- Add EQ::constants::GetConsiderLevelMap() and EQ::constants::GetConsiderLevelName().
- Add quest::getconsiderlevelname(consider_level) to Perl.
- Add eq.get_consider_level_name(consider_level) to Lua.

zone/questmgr.h

@@ -119,6 +119,7 @@ public:
 	std::string getfactionname(int faction_id);
 	std::string getlanguagename(int language_id);
 	std::string getbodytypename(uint32 bodytype_id);
+	std::string getconsiderlevelname(uint8 consider_level);
 	void safemove();
 	void rain(int weather);
 	void snow(int weather);