Use more universal ANSI sequence for 'clear screen and clear buffer'

[colinta]

Fixes ##57700

Tiny tiny patch to bring just a little more terminal support to tsc --watch. In my case, iTerm2 needs this ESC [ 3J sequence in order to clear screen and remove scroll history.

If there's a setting in iTerm2 to change this, I would happily do that, but I didn't see anything.

  92049 passing (6m)

Finished do-runtests-parallel in 6m 22.9s
Completed runtests-parallel in 6m 57.3s
✨  Done in 417.81s.

[mrazauskas]

For what it’s worth, the ansi-escapes library has two similarly named methods: clearScreen() and clearTerminal().

clearScreen() is the same as current tsc --watch implementation.

clearTerminal() is more complex and it is based on Jest's implementation (see sindresorhus/ansi-escapes#6 and https://github.com/jestjs/jest/blob/6b120fbc5d1cadb3ef205bd1d48549155bed5dd1/packages/jest-util/src/specialChars.ts#L18-L20)

I am pointing to ansi-escapes, because it is rather widely used. Not sure if there are any standards in this field.

[jakebailey]

If we're going to do this, I'm somewhat inclined to take the more popular approach of using the same sequence that ansi-escapes/jest take, though that appears to be platform specific which may make our tests unhappy.

I'll have to ask for feedback on this from the team.

[colinta]

I wonder if we even need to make a distinction between mac and windows

echo -n -e "\x1B[2J\x1B[3J\x1BH\x1B[0f"

Works on all my terminals (Terminal, iTerm, & VSCode). I don't have a Windows machine to test on, though. (I updated the PR to use this sequence)

[colinta]

The passage of time made me forget the ANSI sequence I had settled on, but I remembered this morning and updated this PR one more time.

So, the sequence in there is based on the one from ansi-sequences. It's just a combination of the two, without the OS check.