PEM-encoded password-protected ssh keys are not supported leading to "Error resolving authority" error

[p12tic]

When trying to connect to a certain host I get this error:

[Info  - 20:32:06.795] Resolving ssh remote authority 'my-host' (attemp #1)
[Trace  - 20:32:06.819] Identity keys:
/path/to/key ssh-rsa SHA256:XXX
[Info  - 20:32:07.352] Trying no-auth authentication
[Info  - 20:32:07.414] Trying publickey authentication: /path/to/key ssh-rsa SHA256:XXX
[Error  - 20:32:07.538] Error resolving authority
Error: All configured authentication methods failed
    at me (.../extensions/jeanp413.open-remote-ssh-0.0.49/out/extension.js:1:155776)
    at .../extensions/jeanp413.open-remote-ssh-0.0.49/out/extension.js:1:409435
    at authHandler (.../extensions/jeanp413.open-remote-ssh-0.0.49/out/extension.js:1:404812)
    at Se (.../extensions/jeanp413.open-remote-ssh-0.0.49/out/extension.js:1:158994)
    at process.processTicksAndRejections (node:internal/process/task_queues:85:11)

Turns out that I was using old-style PEM-encoded key (header has BEGIN (RSA|DSA|EC) PRIVATE KEY text). Openssh private keys (header has BEGIN OPENSSH PRIVATE KEY) work fine.

[p12tic]

I will create a PR with a fix.