Compile on Windows

ttyd can be built with MSYS2 on windows. The build instructions is removed from the master branch, please refer to the old release: https://github.com/tsl0922/ttyd/tree/1.5.2/msys2.

NOTE: Native windows console programs may not work correctly due to pty incompatibility issues. As a workaround, you can use winpty as a wrapper to invoke the windows program, eg: ttyd winpty cmd.

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Eventually, ttyd will support the native ConPTY API on windows 10 (#101).