Synchronized output support

[Nutzzz]

Fixes #15

No more flicker during animation!

For Windows Terminal support, this currently requires a Canary nightly build.

The only issue that I see right now is that the cursor dances a bit (see video). I'm sure it's something simple; I haven't looked into it yet. I'll mark this as draft until that's fixed; but perhaps it can be moot since the cursor flickering has always been an issue: should we just turn off the cursor when animating and turn it back on again after?
Hide: CSI ?25l
Show: CSI ?25h.

EDIT: And I guess we might swap the reverse /t only if Synchronized output is supported...?
EDIT 2: Note this video is the elephant APNG; the elephant GIF still has the transparent eye issue in #24 .

Elephant.no.flicker.mp4

[Nutzzz]

OK, I fixed the cursor "dancing" during animation with sync enabled by changing to Console.Write() instead of WriteLine(), but went ahead and hid the cursor anyway, and then the cursor show is a WriteLine().

Animations look so much better without the cursor, but using Ctrl+C does result in the cursor not being re-enabled. With WT at least, simply typing a letter makes it reappear. But I'm a little bit torn about using it because of the effect on other terminals. Depending on which one, it looks like there are a variety of tricks people might use to get it back, but I can imagine it might be an annoying experience. But it's so easy not to use Ctrl+C when the prompt is right in front of you. What do you think?

EDIT: Wait, the hide should go in the example, not the library. Then it's much less of an issue....

[teramako]

OK, I fixed the cursor "dancing" during animation with sync enabled by changing to Console.Write() instead of WriteLine(), but went ahead and hid the cursor anyway, and then the cursor show is a WriteLine().

Animations look so much better without the cursor, but using Ctrl+C does result in the cursor not being re-enabled. With WT at least, simply typing a letter makes it reappear. But I'm a little bit torn about using it because of the effect on other terminals. Depending on which one, it looks like there are a variety of tricks people might use to get it back, but I can imagine it might be an annoying experience. But it's so easy not to use Ctrl+C when the prompt is right in front of you. What do you think?

EDIT: Wait, the hide should go in the example, not the library. Then it's much less of an issue....

Yes, the cursor dancing behavior is indeed a concern.
I once tried to put code in the library to make the cursor disappear, but I stopped immediately.
I agree with posting a way to remove the cursor in the example program and not in the library.

[teramako]

Wonderful! This is a nice feature.