Add shock discretization functionality #206
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This PR is duplicate of #170. Merging the previous PR with the main branch became unfeasible because there were too many merge conflicts.
This PR will add a way to specify multiple common shock types directly through the interface of LCM.
To accomplish this, a new
ShockGridgrid class will be added. To make the values of this grid depend on parameters, the values will be calculated dynamically once the user provides them. During the solution the shocks will be discretized like a normal ContinousGrid, but during the simulation, the next values will be drawn from the shocks undiscretized probability distribution. Here the shocks transition probabilities will be linearly interpolated, as the discretized transition probabilities are only calculated at the gridpoints, but subjects can land between gridpoints.