Implement store specification

[MrtnvM]

Implement the Store API specification for the iOS Render SDK.

This PR introduces a comprehensive data management system for scenario data, featuring:

• Multiple Storage Backends: In-memory, UserDefaults, File, Scenario Session, and remote HTTP backend.
• Reactive Observation: Combine publishers for real-time updates on key paths.
• Validation System: Configurable rules for type, range, pattern, and required constraints.
• Live Expressions: Automatically recomputing values based on dependencies.
• Thread Safety & Transactions: Ensures data consistency with a serial dispatch queue and batch operations.
• Version Management: Automatic data cleanup on major version bumps.
• Debug Tools: An inspector for development-time data monitoring and manipulation.

---

 

[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
_{Learn more about Cursor Agents}