Implement Page Model Interpreter service in the Shared SPA SDK

Follow specifications from the technical design document: https://docs.google.com/document/d/1AYu1d5IsA4xPtmUM9wmaQnhDamTP9TPn4ZT_daFGn7M/edit#heading=h.gfcmcimanw4j

Requirements:

• The code of the shared library should be strictly typed.
• The code should follow SOLID principles.
• Objects produced by the SDK should be immutable, so we can avoid side-effects in state management.
• All publicly available functions of the SDK should be pure, so a user will be able to extend the SDK on his end.
• The code should be covered by unit tests.
• Implement queue and DFS to avoid recursion.
• Implement a factory or factory method to produce components instances.
• Don't call the factory from within a component/page constructor.
• `parseModel` should parse/build the tree in O(N) operations and consume O(N) memory.