Add dream-html package #3740

Job	Run time
nix-fmt-check	1m 48s
Native packages (macOS, OCaml 4_14)	12m 47s
Native packages (Linux, OCaml 4_14)	5m 35s
Native packages (macOS, OCaml 5_0)	14m 6s
arm64 packages (OCaml 4_14)	34s
Native packages (Linux, OCaml 5_0)	3m 51s
Native packages (macOS, OCaml 5_1)	14m 35s
Native (Top-level) packages (ubuntu-latest)	31s
musl packages (OCaml 4_14)	32s
Native packages (Linux, OCaml 5_1)	16m 32s
Native (Top-level) packages (macos-13)	1m 20s
arm64 packages (OCaml 5_0)	44s
musl packages (OCaml 5_0)	30s
arm64 packages (OCaml 5_1)	39s
musl packages (OCaml 5_1)	36s
	1h 14m 40s

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