Implements eraseToAnyWorkflow function on Workflow.

[nickkaczmarek]

Linked Issue: Closes #105

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[codecov-commenter]

Codecov Report

Merging #168 (9ca8555) into main (3097cea) will increase coverage by 0.00%. The diff coverage is 100.00%.

:exclamation: Current head 9ca8555 differs from pull request most recent head abdc59f. Consider uploading reports for the commit abdc59f to get more accurate results

@@           Coverage Diff           @@
##             main     #168   +/-   ##
=======================================
  Coverage   91.27%   91.28%           
=======================================
  Files          92       92           
  Lines        2373     2375    +2     
=======================================
+ Hits         2166     2168    +2     
  Misses        207      207           

Impacted Files	Coverage Δ
Sources/SwiftCurrent/Models/Workflow.swift	100.00% <100.00%> (ø)

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