Type updates and runtime error handling

[jamesrweb]

Update project types and add a guard wrapper to log an appropriate error message if no sketch is provided at runtime.

Proposed Changes

• Remove legacy types
• Add new types for guard handler
• Handle runtime exception case for a missing sketch prop.

Additional Notes (optional)

This PR is more of a proposal, please review and provide feedback as usual, happy for design / implementation suggestions if any come to mind for discussion!