The wish-exec example with vim worked because neovim was not using
STDERR.

Bubbletea doesn't have a concept of stdout and stderr, just output, so
`tea.ExecProcess` sets the `exec.Cmd` stderr to `os.Stderr`.

This would fail for bash, for instance.

This also introduces a `wish.Cmd` type and a `wish.Command`
function to properly set up a `wish.Cmd` based on `ssh.Session` (and
optionally a Pty), which can then be used with `tea.Exec`.

Finally, it adds to the wish-exec example, including the `s` key to run
a shell (bash).

closes #228

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* fix: create a new pty for exec.Cmd

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* fix: improvements

* fix: test

* fix: windows

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* fix: unneeded err

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* fix

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* fix: resize && race

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* fix: windows/linux

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* test: ignore on windows for now

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* fix: sync

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* test: hammer

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

* chore: import

---------

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>