Class for storing numerical arrays between iterations.
Add iterative fd solver

Constraint update at each iteration.
Add test for iterative solver


Lint

remove whitespace after unpacking operator
Lint

clean whitespace
update python req to >= 3.7


Update build versions

remove python version 3.6
Add mesh iterative solver


Clean mesh iterative solver


Add failsafe for residuals


fix residuals checking


Clean

Refactor for general readability.

Base solver manager class for running iterative algorithms, storing numerical data, and results

Relocate and refactor with base class and FD specific class

Call new solver backend implementation

Reference updated solver backend

Change naming, refactor unpacking of numdata

Change responsibility to post-process from solver to lazy calculation in FDNumericalData

Change from dataclass to regular class

Change FDNumericalData from dataclass into regular class with lazy calculation of property variables.
Implicit recalculation of  dependent variables.
Add shorthand aliases to numerical arrays.

Abstract fd convenience functions, by implementing Solver and FDNumericalData backends.

Change scripts to call new implementations through Solvers and FDNumericalData.