feat(config): config class added

At many points in the code we may want configurable options, the Config class usses a yaml file to make this easy. It also allows for namespace references "opac:lowtemp:file" etc...

src/config/private/config.cpp

@@ -0,0 +1,31 @@
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <vector>
+#include <map>
+
+#include "yaml-cpp/yaml.h"
+
+#include "config.h"
+
+Config::Config() {}
+
+Config::~Config() {}
+
+Config& Config::getInstance() {
+    static Config instance;
+    return instance;
+}
+
+bool Config::loadConfig(const std::string& configFile) {
+    configFilePath = configFile;
+    try {
+        yamlRoot = YAML::LoadFile(configFile);
+    } catch (YAML::BadFile& e) {
+        std::cerr << "Error: " << e.what() << std::endl;
+        return false;
+    }
+    return true;
+}
+