Adding taptree_of_horror example. #2087

Job	Run time
Bench - nightly toolchain (recent)	1m 1s
Docs - nightly toolchain (recent)	39s
Docs - stable toolchain (recent)	44s
Embedded	1m 14s
Format - nightly toolchain	12s
Lint - nightly toolchain (recent)	27s
Integration tests - stable toolchain (26_0)	59s
Integration tests - stable toolchain (25_2)	53s
Test - 1.63.0 toolchain (minimal)	25m 46s
Test - nightly toolchain (minimal)	14m 19s
Test - 1.63.0 toolchain (recent)	26m 5s
Test - stable toolchain (minimal)	15m 41s
Integration tests - stable toolchain (25_1)	1m 3s
Test - nightly toolchain (recent)	14m 39s
Test - stable toolchain (recent)	16m 16s
Integration tests - stable toolchain (25_0)	1m 27s
Integration tests - stable toolchain (24_2)	48s
Integration tests - stable toolchain (24_1)	1m 6s
Integration tests - stable toolchain (24_0_1)	1m 25s
Integration tests - stable toolchain (23_2)	1m 28s
Integration tests - stable toolchain (23_1)	56s
Integration tests - stable toolchain (23_0)	49s
Integration tests - stable toolchain (22_1)	1m 8s
Integration tests - stable toolchain (22_0)	1m 18s
Integration tests - stable toolchain (0_21_2)	48s
Integration tests - stable toolchain (0_20_2)	1m 12s
Integration tests - stable toolchain (0_19_1)	58s
Integration tests - stable toolchain (0_18_1)	1m 22s
Integration tests - stable toolchain (0_17_1)	1m 19s
	2h 16m 2s

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