Add documentation for the ROM 1D Simulation stenosis model

[ktbolt]

There is no documentation for the ROM 1D Simulation stenosis model.

@JonathanPham or @mrp089 Can you please add the documentation? If you send me the text and equations I can add it.

[mrp089]

The stenosis model itself is described here: https://doi.org/10.1109/tbme.2003.812201

Extraction of stenosis model parameters is documented here: https://arxiv.org/abs/2111.04878 (Section 2.4.4)

[mrp089]

Updated link for second paper after publication: https://doi.org/10.1002/cnm.3639