Add dream-html package (#1150) #3741

Job	Run time
nix-fmt-check	1m 43s
Native packages (macOS, OCaml 4_14)	14m 25s
Native packages (Linux, OCaml 4_14)	7m 25s
arm64 packages (OCaml 4_14)	47s
Native packages (macOS, OCaml 5_0)	23m 18s
Native packages (Linux, OCaml 5_0)	5m 56s
musl packages (OCaml 4_14)	1m 7s
Native packages (Linux, OCaml 5_1)	7m 9s
Native packages (macOS, OCaml 5_1)	14m 33s
arm64 packages (OCaml 5_0)	57s
Native (Top-level) packages (ubuntu-latest)	1m 6s
musl packages (OCaml 5_0)	58s
Native (Top-level) packages (macos-13)	2m 13s
arm64 packages (OCaml 5_1)	46s
musl packages (OCaml 5_1)	1m 2s
	1h 23m 25s

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