initial creation of RuleIO

IO/RuleIO.ts

@@ -0,0 +1,20 @@
+class SettingsIO {
+  private static instance: SettingsIO;
+
+  private constructor() {}
+
+  public static getInstance(): SettingsIO {
+    if (!SettingsIO.instance) {
+      SettingsIO.instance = new SettingsIO();
+    }
+    return SettingsIO.instance;
+  }
+
+  // reading from yaml
+  // reading from json
+  // reading from regular txt file
+
+}
+
+const settingsIO = SettingsIO.getInstance();
+export default settingsIO;