Add ParsedCurveGenerator

[miaoyinb]

Reason

It has been found needed to have a general curve mesh generator to enable meshing of some complex shapes. The mesh generator should be able to work with existing FillBetweenPointVectorsTools and XYDelaunayGenerator to expand their meshing capabilities.

Design

ParsedCurveGenerator will be added to generate a curve mesh that is defined by (x(t), y(t), z(t)) using the Function Parser library that is already adopted by MOOSE.

FillBetweenCurvesGenerator will be added to work with the curves generated using the FillBetweenPointVectorsTools.

The generated curves (if closed) should be naturally compatible with XYDelaunayGenerator.

Impact

Enable meshing of some complex geometry features. This has been found needed for some reactor designs.

[GiudGiud]

Does the curve need to be closed?

[miaoyinb]

Does the curve need to be closed?

Both closed and open curves can be meshed.