Allow partitionedge and partitionedges to accept pairs

[JoeyT1994]

A quick PR which allows partitionedge(pg, edge) and partitionedges(pg, edges) to accept a Pair or Vector{Pair} alongside AbstractEdge and Vector{AbstractEdge} types.

[mtfishman]

Thanks, could you add some tests?

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (569e829) 78.54% compared to head (cb69407) 78.41%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/Graphs/partitionedgraphs/partitionedgraph.jl	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #47      +/-   ##
==========================================
- Coverage   78.54%   78.41%   -0.14%     
==========================================
  Files          31       31              
  Lines        1184     1186       +2     
==========================================
  Hits          930      930              
- Misses        254      256       +2     

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[JoeyT1994]

Sure I added a few tests.

[mtfishman]

Looks good, thanks!