[Quest API] Add GetLDoNThemeName() to Perl/Lua. (#1861)

* [Quest API] Add GetLDoNThemeName() to Perl/Lua.
- Add quest::getldonthemename(theme_id) to Perl.
- Add eq.get_ldon_theme_name(theme_id) to Lua.

* Update embparser_api.cpp

zone/questmgr.cpp

@@ -1036,6 +1036,10 @@ std::string QuestManager::getskillname(int skill_id) {
 	return EQ::skills::GetSkillName(static_cast<EQ::skills::SkillType>(skill_id));
 }
 
+std::string QuestManager::getldonthemename(uint32 theme_id) {
+	return EQ::constants::GetLDoNThemeName(theme_id);
+}
+
 std::string QuestManager::getfactionname(int faction_id) {
 	return content_db.GetFactionName(faction_id);
 }