Don't show api-token,host,org,flow,trail in example use cases

[JonJagger]

Billy created a document for Emburse using chat gpt. It looks like AI is being influenced by the examples at the end of each CLI command at https://docs.kosli.com/

This commit:

• removes flags that would commonly be set via environment-variables. Specifically, --api-token, --host, --org, --flow, --trail.
• adds some text explaining the assumption that these are set via env-vars in the examples.
• removes the trailing backslashes.

Note: It does this in the docs processing of the source .go files. In other words, the flags still exist in the original source in case we wish to undo this change.

Before

After