This allows an escape code to invoke user-defined extensions found in
/home/rahm/.local/bin/alacritty-ext.sh. The terminal passes to this
script the escape-code arguments.

This allows things like opening links in the browser even through an ssh
connection.

Clippy suggests using the function provided in std.

This is only an update to the development version and does not represent
a stable release.

This adds a new `escape_args` option to `tty::Options` on Windows, which
can be used to automatically escape all arguments passed to the shell.

While useful to automatically make most arguments work on Windows, there
are some scenarios where it is not possible for users to properly
specify arguments with this option enabled (e.g.: `cmd /c`). An option
should always be present to disable this option when used.

The implementation is based on the `Command` code in Rust's STD lib.

This fixes a missing `GOTO 0,0` when entering the terminal origin mode.

Closes #8636.