[enhancement] enable placing constructor params in any part of function body

[A60AB5450353F40E]

Declare them in contract() statement, but decide their position later, so compiled bytecode can add them later to avoid unnecessary stack juggling

[rkalis]

This could be a nice optimisation. There's also some advantages to keeping them at the start with e.g. simulated state. I think it's also easier to use compiled CashScript contracts outside of the official SDK if the constructor args are at the start.

So it might not be worth the extra complexity / tradeoffs to add this functionality, and the optimisation is probably not super big, so it might be more fruitful to allow for larger contracts on BCH instead. I'll leave the issue open to consider in the future.