Add basic serial monitor

[icewind1991]

Adds a basic --monitor option to open a serial monitor after flashing is completed

[MabezDev]

After addressing the issue clippy spotted, this is all good I think!

[jessebraham]

This seems to work fine on my Mac, however it will not build on Windows for me. I believe termion is the culprit, output can be found in this gist. It's possible that it's an issue with my system, but is somebody else able to confirm?

[icewind1991]

switched to crossterm for doing the terminal handling which does work under windows

[jessebraham]

I'm unfortunately still having issues on Windows :(

PS C:\Users\Jesse Braham\Documents\Sandbox\esp32c3-experiments> cargo espflash --monitor COM3
   Compiling esp32c3 v0.1.0 (C:\Users\Jesse Braham\Documents\Sandbox\esp32c3-experiments)
    Finished dev [unoptimized + debuginfo] target(s) in 0.74s
Serial port: COM3
Connecting...

[00:00:01] ########################################      12/12      segment 0x0
[00:00:00] ########################################       1/1       segment 0x8000
[00:00:01] ########################################      13/13      segment 0x10000
Commands:
    CTRL+R    Reset chip
    CTRL+C    Exit

Error: Windows stdio in console mode does not support writing non-UTF-8 byte sequences

[icewind1991]

Can't reproduce:

[jessebraham]

Okay, if it's working for you then it's likely that the issue lies with my installation. I recall having changed the default PowerShell encoding at some point so that may have something to do with it. Thank you for checking.

[icewind1991]

@jessebraham can you see if the latest commit changes anything for you?

[jessebraham]

That seems to have fixed it, thanks!