Added unfinished prototype of the format helper flag

src/main.cpp

@@ -1,5 +1,6 @@
 #include <iostream>
 #include <algorithm>
+
 #include "CLI11.hpp"
 #include "../include/distime.h"
 
@@ -17,11 +18,17 @@ int main(int argc, char **argv) {
     app.usage("USAGE: distime [OPTIONS]");
 
     char timeFormat {};
-
     app.add_option("-f, --format", timeFormat, "Dictates which format to output as")
     ->multi_option_policy (CLI::MultiOptionPolicy::Throw)
     ->default_val('f');
 
+    auto formatHelp { [] () {
+        std::cout
+        << ""
+    } };
+
+    app.add_flag_callback("-fh, --format-help", , "Help with formats");
+
     CLI11_PARSE(app, argc, argv);
 
     validateTimeFormatSelection(timeFormat);