feat: preserve cross-simulator model semantics

[hongyuanjia]

Summary

Closes #31.

Strengthen DeST-to-EnergyPlus model transfer by preserving geometry, construction, schedule, internal-load, humidity-control, naming, and weather semantics while making the conversion pipeline easier to validate and maintain.

Changes

• Add to_epw() and convert complete DeST CLIMATE_DATA years with humidity and solar-radiation diagnostics.
• Implement a traceable typical-storey approximation for multiplied storeys, including cyclic repeated-floor boundaries and adiabatic cut interfaces.
• Normalize surface topology, preserve reciprocal room boundaries, reduce unnecessary geometry fragmentation, and conserve window area across split host surfaces.
• Preserve construction direction and identity, including reversed SIDE1 layer stacks, distinct door constructions, transparent-door material lookup, and aggregate window performance.
• Preserve Schedule:Week:Compact day-type mappings, dedicated week 53 profiles, Schedule:Day references, and DeST's Monday-first annual RunPeriod.
• Convert humidity schedules, ZoneControl:Humidistat, Ideal Loads references, outdoor-air requirements, and supported internal-gain minimum schedules while rejecting unsupported moisture sources.
• Keep names deterministic across dependent tables and multi-building models, including building-prefixed storey and room names.
• Harden Access-to-SQLite failure cleanup and reorganize geometry, construction, naming, schedule, and object-assembly logic around shared internal helpers.
• Expand testthat coverage with real DeST fixtures, topology and area invariants, reciprocal-reference checks, and successful annual EnergyPlus execution.