Hindcast and Projection Functions; Simply Results Paths

[lrennels]

@tonyewong this PR does two major things:

1. Make run_hindcast and run_projections MimiBRICK functions
2. Simply the use of results paths such that (1) we remove the date and chain length from the names of the files and (2) require users to input a output directory when running calibration. We don't really want things automatically going to a results folder for a package since users won't be able to a access results easily.

I recognize (2) might mess with some current scripts and your examples files which have those extensions, so I'm happy to talk this through but I think it's better for it as a package.

[codecov-commenter]

Codecov Report

Merging #40 (80dcf29) into master (6c10eb5) will increase coverage by 1.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
+ Coverage   96.19%   97.22%   +1.02%     
==========================================
  Files          19       21       +2     
  Lines        1420     1766     +346     
==========================================
+ Hits         1366     1717     +351     
+ Misses         54       49       -5     

Flag	Coverage Δ
unittests	97.22% <100.00%> (+1.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/calibration/calibration.jl	93.44% <100.00%> (+4.87%)	⬆️
src/calibration/calibration_helper_functions.jl	98.76% <100.00%> (+0.16%)	⬆️
src/calibration/run_hindcast.jl	100.00% <100.00%> (ø)
src/calibration/run_projections.jl	100.00% <100.00%> (ø)
src/downscale.jl	84.84% <100.00%> (-0.12%)	⬇️
src/components/glaciers_small_icecaps_component.jl	100.00% <0.00%> (+25.00%)	⬆️

📣 Codecov can now indicate which changes are the most critical in Pull Requests. Learn more