Add Singularity Function Plotting and Evaluation

[memtech3]

It would be super cool if I could enter functions in singularity function notation and have engineeringpaper plot them, perform integrals and derivatives on them, and allow me to evaluate for values at different input parameters.

[mgreminger]

It depends on the type of singularity function you're talking about, but you're able to create the type of singularity functions required for beam shear and moment diagrams by creating a piecewise function. See this example: https://engineeringpaper.xyz/QuWUrrGDWEZMM3PZrsppgQ

Derivatives and integrals won't work with piecewise functions.

[memtech3]

I'd like to be able to use as well as take integrals and derivatives of functions in Macaulay bracket form