Allow for a "freezed" signed function in ReinitializationTerm

[maltezfaria]

Adds the ability to use either equation (7.5) or (7.6) on Osher and Fedkiw.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.

Project coverage is 21.03%. Comparing base (710f191) to head (25f5734).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/levelsetterms.jl	0.00%	19 Missing ⚠️
src/levelsetequation.jl	0.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (710f191) and HEAD (25f5734). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (710f191)	HEAD (25f5734)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #55       +/-   ##
===========================================
- Coverage   79.76%   21.03%   -58.73%     
===========================================
  Files          12       12               
  Lines         835      832        -3     
===========================================
- Hits          666      175      -491     
- Misses        169      657      +488     

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