CC: Headless Computers

this cc:tweaked addon adds headless computers to computercraft.

there are two variants, just like normal computercraft computers:

• normal headless computer
• advanced headless computer

headless computers do not have an integrated terminal. instead, you can right-click the computer and select a monitor for it to use as its display.

by default, no monitor is selected, making the computer completely headless. you can select any monitor (any size) that is connected to the computer using wired cables.

important limitations

• only monitors connected through wired cables can be used, not like above, below and so on, you must use wired cables.
• you cannot input keyboard keys directly into the computer.
• to provide input, you must either use a mod that allows keyboard input or manually edit the computer's files to have like a osk (on screen keyboard) thing OR some remote keyboard input thing (well, lua scripts using rednet that run a shell and you can input yeah).
• headless computers start automatically.
• a quirk: if you run shutdown you need to either replace the computer and reconn and reset the display OR rejoin the world to get it on again, i plan to make an easier way for that but for now this is the only way.