Ed25519: Point-based separation logic for doubling #1089

Job	Run time
docker-master	7m 58s
build-js-of-ocaml	0s
validate-docker-${{ matrix.env.COQ_VERSION }}	0s
publish-standalone-dry-run	0s
standalone-haskell	0s
test-standalone	0s
test-amd64	0s
build-wasm-of-ocaml	0s
generated-files	0s
deploy-js-wasm-of-ocaml	-1s
docker-check-all	3s
	8m 0s

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