Convert feature data and lookup expressions to NSExpression

[1ec5]

The NSExpression-based property value implementation in #10726 should be able to express the following feature data and lookup operators defined in the style specification:

• geometry-type – custom shapeKind function
• id – custom id function
• properties – custom properties function
• at – aggregate expression array[0]
• has – aggregate expression SELF CONTAINS?

(get and count are already implemented.)

[fabian-guerra]

Fixed in #11528