Add Height Variation to the Frostologer Keep

[TheDeathlyCow]

Feature description

Add more floors to the Frostologer Castle Keep, and have it randomly determined how much floors are generated.

Checklist:

• Add a third floor
• Add a fourth floor
• Make the roof a separate fallback piece

[TheDeathlyCow]

Removing from the progression update, will include this update with the harrow