Better Kosli CLI diagnostics suggestions based on customer-support call

[JonJagger]

Bug report from a customer this morning. They pasted in the GitHub action output, as follows:

flow 'pottspillsport-lambda-rs-bet-detail-producer' was updated
trail '4652946727ba47b45f99ef8d2055518a68fad924' was begun
artifact bet-detail-producer-v0.45.0.zip was attested with fingerprint: 62ede6da090...
Error: xml: encoding "ISO-8859-15" declared but Decoder.CharsetReader is nil

• It would be very useful if the CLI printed its version number before each fatal error message.
  I could not reproduce this particular error in the latest CLI so I wanted to install the specific version they were using.

• It would also have been very handy if the error message also told you the filename involved.
  In this case the customer was using a kosli attest junit command and was providing an --attachments flag
  specifying a junit xml file in a subdir. The --results-dir was defaulting to . and they were somehow under the impression
  that since they had specified --attachments then that somehow took precedence over the --results-dir (which would then be ignored). But there was another junit xml file in the . dir (which had encoding problems). If we'd printed the filename we would have saved half a day debugging, and the customer might well have been able to diagnose the problem themself.

[JonJagger]

Today I hit this error while trying to move past a new snyk vulnerability in cyber-dojo's creator Pipeline (in Gitlab).
https://gitlab.com/cyber-dojo/creator/-/jobs/8185260142#L260

Error: Error response from daemon: client version 1.44 is too new. Maximum supported API version is 1.43

I again request that we consider the idea of CLI printing its identity (or something similar) before it prints, verbatim, any error messages it receives from external calls...

[dangrondahl]

The second checkbox (filename in JUnit XML parse errors) is resolved by PR #895. The error now includes the filename and a user-friendly message:

Error: failed to parse XML file /path/to/results.xml: only UTF-8 encoding is supported.
If this is not a JUnit results file, use --results-dir to specify the directory containing only JUnit XML files

The first checkbox (printing CLI version before fatal errors) is still open. @JonJagger is this enough to close, or would you like to keep this open for the version number request?