fix(retrieve): improve source-tracking err message

[cristiand391]

What does this PR do?

improves error message when trying to retrieve from an org that doesn't support source-tracking.

before:

➜  lwc-trailhead git:(main) ✗ sf project retrieve start
Preparing retrieve request... Error
Error (1): This command can only be used on orgs that have source tracking enabled, such as sandboxes and scratch orgs.

after:

➜  lwc-trailhead git:(main) ✗ sf project retrieve start
 ›   Warning: @salesforce/plugin-deploy-retrieve is a linked ESM module and cannot be auto-transpiled. Existing compiled source will be used
 ›   instead.
Preparing retrieve request... Error
Error (1): Unable to track changes in source.
This command expects the org to support source tracking, if it doesn't you need to specify the metadata to be retrieved.

Try this:

Use `--source-dir`, `--manifest` or `--package-name` to retrieve in source format:
Use `--target-metadata-dir` to retrieve in metadata format to a directory

What issues does this PR fix or reference?

[skip-validate-pr]