[Quest API] Add GetFactionName() to Perl/Lua. (#1859)

* [Quest API] Add GetFactionName() to Perl/Lua.
- Add quest::getfactionname(faction_id) to Perl.
- Add eq.get_faction_name(faction_id) to Lua.

* Update embparser_api.cpp

* Update embparser_api.cpp

* Update embparser_api.cpp

zone/questmgr.h

@@ -115,6 +115,7 @@ public:
 	std::string getracename(uint16 race_id);
 	std::string getspellname(uint32 spell_id);
 	std::string getskillname(int skill_id);
+	std::string getfactionname(int faction_id);
 	std::string getlanguagename(int language_id);
 	void safemove();
 	void rain(int weather);