Missing support for initial configuration

Neither the interpreter nor the Kotlin code generator support starting the simulation with a specific world configuration

Start by locating the interpreter and Kotlin code generator entry points, then trace how a simulation currently creates its starting world. Define how a specific initial world configuration should reach both paths; done means both can start a simulation from that configuration. No files or tests are named in the issue, so the relevant coverage must be located first.

Written by the indexing model from the issue text.