Bug Description:

If trying to use SSH when the .ssh/config file is absent produces an error here: remote-ssh-connection-provider.ts. However, if you create an empty config file it works fine. Would it make sense to handle no config file the same as an empty config?

Steps to Reproduce:

1. Delete or rename the .ssh/config file.
2. Attempt to use the SSH extension.
3. There should be an error like:

What's curious also is that on windows the error looks like this:

where there should be a slash between the username and .ssh. This issue seems to be purely visual however and doesn't affect the functionality.

Additional Information

• Operating System: Ubuntu 22.04 and Windows 11
• Theia Version: b79a25be