Improve user experience with better manifest errors messages (#1229)

Improve user experience with better manifest errors messages (#1229)

* Improve user experience with better manifest errors messages

This is patch introduces suggestions in various error messages
from the manifest parser. A potential suggestion is made using
edit distance computing from a list of possible values. If the
quality is not deemed good enough, the full list of values is
printed.

* Temp fix GNAT version to check error on macOS

* Revert "Temp fix GNAT version to check error on macOS"

This reverts commit 5da86ba29a013940cb8469ae7f07b8114e488714.

* Try with fixed macOS 10.15 version