feat(parser): add platform-specific parsers and argument conventions

Implement platform-specific parsers for Windows, Linux, and macOS
Add GNU argument convention implementations
Create fake parser for testing purposes
Update CMakeLists to include new headers

include/parser/platform_headers/windows_parser.hpp

@@ -0,0 +1,20 @@
+#pragma once
+#ifdef _WIN32
+#ifndef WINDOWS_PARSER_HPP
+
+#include <argument_parser.hpp>
+#include <fstream>
+#include <string>
+
+namespace argument_parser {
+    class windows_parser : public base_parser {
+        public: 
+        windows_parser() {
+        }
+    };
+
+    using parser = windows_parser; 
+}
+
+#endif 
+#endif