Add EnzymeCore extension #657

Job	Run time
Documentation	43s
Julia 1.8 - ubuntu-latest - x64	17s
Julia 1.8 - macOS-latest - x64	31s
Julia 1.8 - windows-latest - x64	28s
Julia 1.9 - ubuntu-latest - x64	16m 15s
Julia 1.9 - macOS-latest - x64	18m 8s
Julia 1.9 - windows-latest - x64	17m 43s
Julia 1.10 - ubuntu-latest - x64	17m 26s
Julia 1.10 - macOS-latest - x64	15m 20s
Julia 1.10 - windows-latest - x64	17m 31s
Julia nightly - ubuntu-latest - x64	3m 39s
Julia nightly - macOS-latest - x64	4m 13s
Julia nightly - windows-latest - x64	4m 2s
	1h 56m 16s

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