* chore: add /v2 to import module path
go mod requires semantic versioning with versions greater than 1.x
This was a mechanical update by running:
```
go install github.com/marwan-at-work/mod/cmd/mod@latest
mod upgrade
```
Migrate generated files to import /v2
* Fix gen
It looks like it is possible for screen to use control sequences instead
of literal newlines which fails the tests.
This reuses the existing readUntil function used in other pty tests.
* Add screen backend for reconnecting ptys
The screen portion is a port from wsep. There is an interface that lets
you choose between screen and the previous method. By default it will
choose screen if it is installed but this can be overidden (mostly for
tests).
The tests use a scanner instead of a reader now because the reader will
loop infinitely at the end of a stream.
Replace /bin/bash with bash since bash is not always in /bin.
* Remove connection_id from reconnecting PTY logger
This serves multiple connections so it makes no sense to scope it to a
single connection.
Also lets us use "connection_id" when logging write errors instead of
"other_conn_id".
* Use PATH to test buffered reconnecting pty
The problem is that the headers get doubled up (not overwritten) and
browsers do not like multiple values for the allowed origin even though
it appears the spec allows for it.
We could prefer the application's headers instead of ours but since we
control OPTIONS I think preferring ours will by the more consistent
experience and also aligns with the original RFC.
