feat: Add descriptions and usage instructions for command classes

Author: nihaltp

src/main/java/com/mycmd/commands/CdCommand.java

@@ -53,4 +53,14 @@ public void execute(String[] args, ShellContext context) {
             System.out.println("The system cannot find the path specified.");
         }
     }
+
+    @Override
+    public String description() {
+        return "Change the current working directory or display it.";
+    }
+
+    @Override
+    public String usage() {
+        return "cd [path]";
+    }
 }

src/main/java/com/mycmd/commands/ClsCommand.java

@@ -34,4 +34,14 @@ public void execute(String[] args, ShellContext context) {
             System.out.println("Error while clearing the screen: " + e.getMessage());
         }
     }
+
+    @Override
+    public String description() {
+        return "Clear the console screen.";
+    }
+
+    @Override
+    public String usage() {
+        return "cls";
+    }
 }

src/main/java/com/mycmd/commands/ColorCommand.java

@@ -67,4 +67,17 @@ public void execute(String[] args, ShellContext context) {
             System.out.println("\033[0m");
         }
     }
+
+    @Override
+    public String description() {
+        return "Change console text and background colors.";
+    }
+
+    @Override
+    public String usage() {
+        return "color [<background><text>]\n" +
+               "  <background> and <text> are hexadecimal digits (0-9, A-F).\n" +
+               "  Example: color 0A sets black background with bright green text.\n" +
+               "  Call without arguments to reset to default colors.";
+    }
 }

src/main/java/com/mycmd/commands/CopyCommand.java

@@ -43,4 +43,14 @@ public void execute(String[] args, ShellContext context) {
             System.out.println("Error copying file: " + e.getMessage());
         }
     }
+
+    @Override
+    public String description() {
+        return "Copy a file from source to destination.";
+    }
+
+    @Override
+    public String usage() {
+        return "copy <source> <destination>";
+    }
 }

src/main/java/com/mycmd/commands/DelCommand.java

@@ -35,4 +35,14 @@ public void execute(String[] args, ShellContext context) {
             }
         }
     }
+
+    @Override
+    public String description() {
+        return "Delete one or more files.";
+    }
+
+    @Override
+    public String usage() {
+        return "del <file1> [file2 ...]";
+    }
 }

src/main/java/com/mycmd/commands/HistoryCommand.java

@@ -20,4 +20,14 @@ public void execute(String[] args, ShellContext context) {
             System.out.println((i + 1) + ". " + history.get(i));
         }
     }
+
+    @Override
+    public String description() {
+        return "Display the list of previously executed commands.";
+    }
+
+    @Override
+    public String usage() {
+        return "history";
+    }
 }

src/main/java/com/mycmd/commands/HostnameCommand.java

@@ -31,4 +31,14 @@ public void execute(String[] args, ShellContext context) {
         }
         System.out.println(hostname);
     }
+
+    @Override
+    public String description() {
+        return "Display the hostname of the current computer.";
+    }
+
+    @Override
+    public String usage() {
+        return "hostname";
+    }
 }

src/main/java/com/mycmd/commands/MkdirCommand.java

@@ -32,4 +32,14 @@ public void execute(String[] args, ShellContext context) {
             System.out.println("Failed to create directory.");
         }
     }
+
+    @Override
+    public String description() {
+        return "Create a new directory.";
+    }
+
+    @Override
+    public String usage() {
+        return "mkdir <directory_name>";
+    }
 }

src/main/java/com/mycmd/commands/RmdirCommand.java

@@ -37,4 +37,14 @@ public void execute(String[] args, ShellContext context) {
             System.out.println("Failed to delete directory.");
         }
     }
+
+    @Override
+    public String description() {
+        return "Remove an empty directory.";
+    }
+
+    @Override
+    public String usage() {
+        return "rmdir <directory_name>";
+    }
 }

src/main/java/com/mycmd/commands/TimeCommand.java

@@ -32,4 +32,14 @@ public void execute(String[] args, ShellContext context) {
         String formattedTime = now.format(formatter);
         System.out.println("The current time is: " + formattedTime);
     }
+
+    @Override
+    public String description() {
+        return "Display the current local time.";
+    }
+
+    @Override
+    public String usage() {
+        return "time";
+    }
 }