CompatHelper with ITensorRegistry #4
                
     Merged
            
            
          
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Based on https://github.com/JuliaRegistries/CompatHelper.jl/blob/v3.12.0/.github/workflows/CompatHelper.yml.
As @lkdvos mentioned in ITensor/ITensorPkgSkeleton.jl#47, ideally we would do something like https://github.com/julia-actions/julia-buildpkg/blob/v1.7.0/action.yml#L56-L63 to allow customizing which local registries to add, but for now I'm hard coding it to add the ITensorRegistry.