Build parametric Choreo auto based on measurements that can be taken on a real field

[nlaverdure]

Exploit Choreo's ability to define variables to make a parametric auto that can be stretched or shrunk when measurements are taken of the actual playing field at our events.

To improve user experience, we have replaced almost every number input in the application with mathematical expression inputs, powered by mathJS. MathJS has full dimensional analysis awareness, allowing inputs to be specified in whichever unit you like, and rejecting inputs that are not dimensionally correct. Choreo will also save the expression as you typed it, instead of evaluating and discarding it at the moment of submission.

Furthermore, Choreo allows you to define a project-wide set of variables that can be substituted into any appropriate expression in the project. Variables can be defined as single numbers with a variety of dimensions, but Choreo also has aggregate variables to organize the x, y, and heading components of an important pose.

Choose a set of measurements that are quick and easy to take with a measuring tape.

Only add as many measurements that are needed to define the parametric auto.

In case there is not enough time to take all measurements, prioritize the measurements to be taken, ordered by how much our autos are sensitive to error in each measurement.

[nlaverdure]

See SleipnirGroup/Choreo#297