Add basic VT100 scrolling

[RetiredWizard]

This PR adds

• Basic VT100 scrolling (full screen only, I'm looking at scrolling range but it's fighting me)
• A place holder for the VT100 cursor On/Off sequence
  (thinking may be useful after Addding support for inverted tiles in TileGrid #10102)
• Support for a third parameter passed to the screen attribute
  (allows for somewhat common reset/foreground/background sequence)
• Add ESC[H which does the same thing as ESC[0;0H

[RetiredWizard]

I have changes ready that add a CIRCUITPY_TERMINALIO_VT100 compile flag to disable the new VT100 escape sequence support on all SAMD21 boards using the mpconfigport.mk file. I figured I should wait to submit the commit so that these failures could be checked out....

[TheKitty]

It looks like flash is overflowing in some languages for some boards. Maybe the code size is making terminalio just big enough to exceed the flash in certain situations for certain languages. @dhalbert might be able to verify.

[RetiredWizard]

I've added the logic to disable the advanced VT100 escape sequence for samd21 boards but haven't utilized it yet so that the overflowing boards could be examined in case there is a better approach to resolve the overflows for the particular boards.

[tannewt]

Please do disable this on small boards. No need to add new features to them.

[tannewt]

Thank you!