Improve the intelligibility of error messages in Entity/FieldConfig.php

Problem/Motivation

The error messages, one in particular, generated in Entity/FieldConfig.php are unintelligible.

Example:
The following error was generated on a configuration import:
"Attempt to create a field body that does not exist on entity type node."

I had a quick chat with @larowlan in slack #australia-nz and he suggests:

In this specific case I think you're missing field.storage.node.body and it is trying to create field.field.node.(something).body

If that's correct then that could help us come up with a clearer error message.

I wasn't able to deduce for myself what the error message was saying, was it a field called body or the body of a field, "attempt to create field body that does not exist", the opposite sounds more like an error scenario.

If "field body" is a standard term in drupal, I'm not aware of it (which could be me), though googling "drupal field body" returns results relating to the "body field".
And is the error that it 'attempted' to create something that does not exist, or is the error that something happened during the attempt.
I just don't know, and don't feel comfortable speculating on what an error message is trying to convey.

So, as you can see, at least for me this error message is very difficult to comprehend.

In case someone happens to search that error and land on this page, in my case the error occured during a configuration import on a fresh site install via drush cim. Simply running drush cim resolved the error in my case.

Proposed resolution

Formulate more intelligle error messages so as to improve comprehension when they are encounted.

There is a simlar issue open for drupal 7 here: https://www.drupal.org/project/drupal/issues/2077163