Provide a document that describes the Reward Calculation #18915

Job	Run time
cabal-format	7s
fourmolu	43s
gen-hie	6m 52s
Check if formal-ledger-specifications SRP is valid	13s
Check branch history	11s
shellcheck	7s
build (9.10.2, ubuntu-latest)	19m 8s
build (9.8.4, ubuntu-latest)	22m 13s
build (9.12.2, ubuntu-latest)	19m 36s
build (9.6.7, ubuntu-latest)	22m 43s
Tests completed	2s
codegen	1s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	1s
Send a slack notification on \#ledger-internal if the nightly build failed	1s
	1h 31m 58s

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