CTRL+U, CTRL+W, CTRL+A, CTRL+E Functionality

[jckirton]

I feel that at least these keyboard shortcuts could be added to make the game feel more like an actual terminal to use, and would also reward knowledge of real-world CLI usage knowledge.

What these shortcuts do:

• CTRL+U - Clears whatever is currently being typed. hackmud currently has ESC as an equivalent.
• CTRL+W - Deletes word-by-word, like opt+delete on mac. (delete is backspace for windows, not del.)
• CTRL+A - Moves cursor to beginning of text box.
• CTRL+E - Moves cursor to end of text box.

[IpsumCapra]

I think CTRL+L, which clears the screen (like cls or clear commands in game) would be a good addition to this list. I didn't want to bloat the discussion list with another thing which basically just extends the list in this post, but if that is more desired, please let me know.