Add render tree #1102

Job	Run time
build (stable)	50s
clippy (stable)	49s
build (beta)	36s
test (stable)	1m 8s
fmt	21s
clippy (beta)	1m 6s
test (beta)	1m 8s
build (nightly)	53s
clippy (nightly)	57s
test (nightly)	1m 12s
build (1.73.0)	45s
build (stable minus 1 release)	32s
test (1.73.0)	1m 15s
clippy (1.73.0)	57s
build (stable minus 2 releases)	44s
clippy (stable minus 1 release)	53s
test (stable minus 1 release)	57s
clippy (stable minus 2 releases)	48s
test (stable minus 2 releases)	1m 4s
	16m 55s

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