`sign` of simplices blocking type inference

> Tracing back through the function calls, the `sign` function, which returns a vector of positive and negative ones corresponding to the sign of a simplex, is returning `::Any`.

This is because the type of the orientation is encoded as a type parameter to `EmbeddedDeltaDualComplex2D`.

One way to work around this is to hard-code `Bool` a la https://github.com/AlgebraicJulia/CombinatorialSpaces.jl/blob/ab1ea66268c631b3964f023dd2d4d41fdbdfd9ed/src/DiscreteExteriorCalculus.jl#L1101

_Originally posted by @lukem12345 in https://github.com/AlgebraicJulia/CombinatorialSpaces.jl/issues/78#issuecomment-2113037349_