rename sys to environment

and change the environment defenition files
to be in environment dir

environment/lin.cpp

@@ -0,0 +1,103 @@
+#include <iostream>
+#include <string>
+#include <filesystem>
+
+#include "environment.hpp"
+#include "func.hpp"
+
+#include <cstring>
+#include <iostream>
+#include <termios.h>
+#include <unistd.h>
+
+bool put_data_on_clipboard(const char *text)
+{
+  size_t len = strlen(text);
+  if (len == 0)
+  {
+    printf("Text is empty\n");
+    return false;
+  }
+
+  // Open a pipe to xclip command
+  FILE *pipe = popen("xclip -selection clipboard", "w");
+  if (!pipe)
+  {
+    printf("Failed to open pipe to xclip\n");
+    return false;
+  }
+
+  // Write text to xclip
+  if (fwrite(text, 1, len, pipe) != len)
+  {
+    printf("Failed to write text to xclip\n");
+    pclose(pipe);
+    return false;
+  }
+
+  // Close the pipe
+  pclose(pipe);
+  return true;
+}
+
+std::string get_user_password()
+{
+  struct termios oldt, newt;
+
+  // Save the current terminal attributes
+  tcgetattr(STDIN_FILENO, &oldt);
+
+  // Copy the old settings to the new settings
+  newt = oldt;
+
+  // Disable echo input
+  newt.c_lflag &= ~ECHO;
+
+  // Apply the new settings
+  tcsetattr(STDIN_FILENO, TCSANOW, &newt);
+
+  // Take input
+  std::string ipt;
+  std::getline(std::cin, ipt);
+
+  // Otherwise next cout will print into the same line
+  std::cout << std::endl;
+
+  // Restore the terminal attributes
+  tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
+
+  return ipt;
+}
+
+std::optional<std::string> get_save_path()
+{
+  namespace fs = std::filesystem;
+
+  const char *homeDir = getenv("HOME");
+  if (homeDir == nullptr)
+  {
+    return {};
+  }
+
+  fs::path userDirectory(homeDir);
+  userDirectory /= ".config";
+  userDirectory /= "password_manager";
+
+  if (!fs::exists(userDirectory))
+  {
+    // Directory doesn't exist, create it
+    if (!fs::create_directory(userDirectory))
+    {
+      return {};
+    }
+  }
+  else if (!fs::is_directory(userDirectory))
+  {
+    // Path exists but is not a directory
+    return {};
+  }
+
+  userDirectory /= "save.txt";
+
+  return userDirectory.string();
+}