Max cell index

[Isawan]

A way to change the max cell index from the command line would be nice even if at build time.

Suppose I wanted to use more than 100,000 is that as straightforward as changing line 22 in src/bounds.rs?

[Wilfred]

Yep, that's correct. Increasing that number will increase the maximum number of cells used during compile-time execution, and the number of cells allocated for runtime execution.

We pass the cells as a vector to add_cells_init, and the size of this vector was due to highest_cell_index.

If you fancy creating a PR to make this a CLI option, that would be welcome :)