Implement "clear" Command for Shell

[IlanVinograd]

Good First Issue: Implement "clear" Command for Shell

Objective

Add a new shell command clear that clears the screen and resets the cursor to the top-left corner.

Task Details

1. Add Command Handling

   • Update the shell input handling logic to recognize the command clear.

2. Clear Screen Functionality

   • Use the existing clearScreen() function in vga.c to clear the screen content.
   • Reset the cursor position to the starting point using setCursorPosition(2, 0) to ensure the shell prompt is displayed after the header.

3. Integration

   • Ensure the clear command does not interfere with other shell commands.
   • Test the functionality by executing the clear command in the shell and verifying that the screen is cleared, and the cursor is reset correctly.

Acceptance Criteria

• Typing clear in the shell should clear the screen and reset the cursor to the prompt position.
• No impact on other shell functionalities.

Hints

• Look at the existing handleBackgroundColor() function for reference on how commands are handled in the shell.
• Use the scroll_screen() function as a fallback if additional modifications are needed to ensure proper cursor placement after clearing.

[Malone-AI]

I have implemented "clear" command for shell, can you assign this issue to me? I'll appreciate it if you can assign it to me.I will propose PR after sorting it out.