[FEAT] Create daff-map-get function

[xelaint]

💡 Feature request

Feature Name

Create daff-map-get function

The Desired Behavior

daff-map-get function to match the sass map get function, with the addition of throwing an error if key does not exist.

User should retrieve it from @daffodil/design/scss/utilities

Example usage:

@use '@daffodil/design/scss/utilities';

@mixin custom-theme($theme) {
	$base: utilities.daff-map-get($theme, core, base);
}

This will replace the daff-map-deep-get function

Your Use Case

Prior Work

Environment

Daffodil version: X.Y.Z
Angular version: X.Y.Z 

 
For Tooling issues:
- Node version: XX  
- Platform:  

Others: