Backlog: Add change-scroll-region (CSR) and re-introduce scroll commands

[imdaveho]

Problem to Solve
Scrolling puts too many things into the buffer and often, will flush due to the input buffer reaching capacity. This, not only causes unwanted behavior, but also needlessly renders too many things at once. Similar to issue #11 this will attempt to minimize the amount of "work" that flush() has to do, and only output the necessary parts of the terminal that needs to change.

Tasks

• add back scrolling ( ^[ Pn T (down) and ^[ Pn S (up) )
• add change scroll region ( ^[ Pn; Pn r to set row start and row end as scrollable and ^[r to reset )
• insert line and delete line to account for the clipped portions (this will reduce the amount written to stdout)
• implement an efficient horizontal scrolling renderer

[imdaveho]

WinAPI:

https://docs.microsoft.com/en-us/windows/console/scrollconsolescreenbuffer

What's nice about the Console API is that Windows already provides not only a Y-axis scroll region, but the bounding Rect also provides the X-axis. But to make it uniform, we'll implement the same logic for the rare horizontal scroll use case.

Old WinAPI scroll up and down: https://github.com/imdaveho/tuitty/blob/51fe91606c8e5beacedc02a50a8337969f212d4c/src/screen/windows/mod.rs#L236