Complete `EraScript` hierarchy with missing classes #13907

Job	Run time
gen-hie	7s
build (8.10.7, ubuntu-latest)	35m 38s
build (9.2.8, ubuntu-latest)	15m 29s
cabal-format	8s
Check branch history	10s
build (9.6.4, ubuntu-latest)	11m 19s
fourmolu	46s
build (9.8.2, ubuntu-latest)	12m 7s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	0s
Tests completed	1s
Send a slack notification on \#ledger-internal if the nightly build failed	0s
	1h 15m 45s

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