Add support for starting values in bridges

[blegat]

Updated list

Constraint Bridge	ConstraintPrimal	ConstraintDual
GreaterToIntervalBridge	x	x
LessToIntervalBridge	x	x
GreaterToLessBridge	x	x
LessToGreaterBridge	x	x
NonnegToNonposBridge	x	x
NonposToNonnegBridge	x	x
VectorizeBridge	x	x
ScalarizeBridge	x	x
ScalarSlackBridge	x	x
VectorSlackBridge	x	x
ScalarFunctionizeBridge	x	x
VectorFunctionizeBridge	x	x
SplitComplexEqualToBridge	x	x
SplitComplexZerosBridge	x	x
SplitIntervalBridge	x	x
SOCtoRSOCBridge	x	x
RSOCtoSOCBridge	x	x
SOCtoNonConvexQuadBridge	NA	NA
RSOCtoNonConvexQuadBridge	NA	NA
QuadtoSOCBridge	NA	NA
SOCtoPSDBridge
RSOCtoPSDBridge
NormInfinityBridge	x	x
NormOneBridge	x	x
GeoMeantoRelEntrBridge	x	x
GeoMeanBridge
RelativeEntropyBridge	x	x
NormSpectralBridge
NormNuclearBridge	x	x
SquareBridge
RootDetBridge
LogDetBridge	x	x
IndicatorActiveOnFalseBridge	NA	NA
IndicatorSOS1Bridge	NA	NA
SemiToBinaryBridge	NA	NA
ZeroOneBridge	NA	NA
AllDifferentToCountDistinctBridge	NA	NA
BinPackingToMILPBridge	NA	NA
CircuitToMILPBridge	NA	NA
CountAtLeastToCountBelongsBridge	NA	NA
CountBelongsToMILPBridge	NA	NA
CountDistinctToMILPBridge	NA	NA
CountGreaterThanToMILPBridge	NA	NA
TableToMILPBridge	NA	NA

Variable Bridge	VariablePrimal	ConstraintPrimal	ConstraintDual
FreeBridge	x
NonposToNonnegBridge	x
RSOCtoPSDBridge
RSOCtoSOCBridge
SOCtoRSOCBridge
VectorizeBridge	x
ZerosBridge