Rename `Style` to `ImplementationStyle` (#8) #14

Job	Run time
IntegrationTest (NamedDimsArrays) / NamedDimsArrays	2m 0s
IntegrationTest (SparseArraysBase) / SparseArraysBase	1m 43s
IntegrationTest (ITensorBase) / ITensorBase	2m 10s
IntegrationTest (ITensorNetworksNext) / ITensorNetworksNext	4m 44s
IntegrationTest (BlockSparseArrays) / BlockSparseArrays	2m 8s
IntegrationTest (DiagonalArrays) / DiagonalArrays	1m 55s
IntegrationTest (KroneckerArrays) / KroneckerArrays	1m 57s
	16m 37s

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