Prompt user for semantic issues on user configuration

[ufukty]

Context

• Dim needs users to follow its schema for writing the user config.
• The package configuration file has some schema rules based on value "shape" (eg. string, enum, or list).
• Dim config schema has additional restrictions that can't be described in the package config thus can't be enforced by the editor.

Problem

Missing to point user for exact invalid rules degrade UX.

Suggestion

Implement changes to prompt user to point invalid user configuration targets.