There should be a way, through the text window, to input a table of parameters. These parameters could then be used in expressions around the sketch, and so the entire sketch could be reconfigured by changing a single parameter value.

There should also be a way to define sets of parameters. E.g. "set A" with a=1, b=10, and "set B" with a=2, b=15. Every set of parameters would define a specific product, with the given dimensions.

For every parameter, there should be the following configuration:

• name (for use in expressions)
• description (human-readable)
• value, or "variable", which lets the solver decide the value
• "min"/"max", for non-variable parameters, to define valid input range

Depends on #75 (since we need to save this table), and #76 (since if changing parameters would break chirality, it's useless).