Add RCT1 colour preset for Observation Tower Pole #266

Job	Run time
Check code formatting	42s
g2.dat	10s
Lint Commit Message	0s
Check changelog formatting	4s
Android	2m 43s
Ubuntu Linux (debug) using clang, coverage enabled	3m 17s
Ubuntu Linux (jammy, debug, [http, network, flac, vorbis OpenGL] disabled) using clang	11m 35s
Ubuntu Linux (AppImage, x86_64)	1m 33s
Ubuntu Linux (jammy, x86_64, portable)	2m 18s
macOS (x64) using CMake	2m 20s
Ubuntu Linux (Docker)	0s
macOS (arm64) using CMake	1m 45s
Debian Linux (bullseye, x86_64, portable)	1m 56s
Windows (win32)	9m 4s
Ubuntu Linux (jammy, i686, portable)	2m 17s
Windows (win32) using mingw	1m 15s
Windows (x64)	9m 2s
Windows (arm64)	9m 26s
macOS universal app bundle	41s
	1h 0m 8s

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