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/linux_parser.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#ifdef __linux__
+#ifndef LINUX_PARSER_HPP
+#include <fstream>
+#include <string>
+
+#include <argument_parser.hpp>
+
+namespace argument_parser {
+    class linux_parser : public base_parser {
+        public: 
+        linux_parser() {
+            std::ifstream command_line_file{"/proc/self/cmdline"};
+            std::getline(command_line_file, program_name, '\0');
+            for(std::string line; std::getline(command_line_file, line, '\0');) {
+                parsed_arguments.emplace_back(line); 
+            }
+        }
+    }; 
+}
+
+#endif 
+#endif