Add dynamic roughness length (z0) from Snowpack to WRF layers

• Add z0_roughness parameter to all coupler interfaces
• Pass dynamic roughness length from Snowpack to WRF
• Update WRF module to use dynamic z0 instead of hardcoded values
• Ensure consistency between Snowpack and WRF roughness calculations
• Recalculate log_z_z0 using dynamic roughness from Snowpack

This change allows the roughness length defined in the io.ini file to be consistently used throughout the code instead of being hardcoded.