[Dynamic Zones] Implement dz templates (#2345)

This allows shared tasks to create dz instances automatically through
the `dz_template_id` field instead of using quest scripts. Quest apis
were also added to create expeditions from template ids.

zone/zone.cpp

@@ -1192,6 +1192,8 @@ bool Zone::Init(bool is_static) {
 	petition_list.ClearPetitions();
 	petition_list.ReadDatabase();
 
+	LoadDynamicZoneTemplates();
+
 	LogInfo("Loading dynamic zones");
 	DynamicZone::CacheAllFromDatabase();
 
@@ -2812,3 +2814,13 @@ void Zone::SendDiscordMessage(const std::string& webhook_name, const std::string
 		LogDiscord("[SendDiscordMessage] Did not find valid webhook by webhook name [{}]", webhook_name);
 	}
 }
+
+void Zone::LoadDynamicZoneTemplates()
+{
+	dz_template_cache.clear();
+	auto dz_templates = DynamicZoneTemplatesRepository::All(content_db);
+	for (const auto& dz_template : dz_templates)
+	{
+		dz_template_cache[dz_template.id] = dz_template;
+	}
+}