QOL changes

[brandynlucca]

• [x] Fix referencing issue with the degrees(...) utility function not being available on a consistent basis
• [x] Update the reforge method for SBF objects so variable definitions and rescaling are more intuitive
• [ ] Update shape object S4 slot definitions so they play more nicely with all ..._initialize(...) functions
• [x] Add a verbose argument to target_strength(... , verbose = T) to give users the option to not have their console spammed when looping over many model input combinations
• [ ] Update the plot method for all scatterer objects to incorporate user inputs more intuitively, such as being able to more easily pass generic plot(...) arguments (e.g. ylim)
• [ ] Update extract(...) so that it can more effectively parse nested variables, such as model results when running extract( ... , model ), which then requires a generic Extract operator ($) to specify the actual model
• [ ] Performance upgrades to computationally taxing models including SDWBA, SDWBA_curved, calibration, and MSS_anderson
• [ ] Deprecate the ..._curved sub-class of models and directly incorporate them into scatterer object as a parallel slot within body
• [ ] Directly incorporate distributions of parameter values into objects that preclude the need for manually iterating each set of parameters via loops or other methods

[brandynlucca]

Update the reforge method for SBF objects so variable definitions and rescaling are more intuitive

Change required rearranging shape coordinate definitions, especially when toggling between FLS and SBF objects (e.g. [x, y, z] vs. [x, w, zU, zL], respectively). Splitting reforge(...) as a method with class-specific functionality is still useful, but so is addressing consistency in variable definitions. This change is inclusive of committing this QOL update.