Add leather addon #2108

Job	Run time
Windows (windows-2022, Visual Studio 17 2022, Debug, x64)	10m 53s
Windows (windows-2022, Visual Studio 17 2022, Debug, Win32)	10m 31s
Windows (windows-2022, Visual Studio 17 2022, Release, x64)	20m 55s
Windows (windows-2022, Visual Studio 17 2022, Release, Win32)	17m 24s
Linux (clang, macos-14, Debug)	4m 54s
Linux (gcc-10, ubuntu-22.04, Debug, true)	15m 22s
Linux (clang-12, ubuntu-22.04, Debug, 3.16.3, 1.73.0, true)	14m 42s
Linux (gcc-9, ubuntu-22.04, Debug, 3.16.3, 1.73.0)	12m 15s
Linux (gcc-11, ubuntu-22.04, Debug, 3.22.1, 1.74.0)	10m 10s
Linux (clang-14, ubuntu-22.04, Debug, 3.22.1, 1.74.0, 17)	1m 54s
Linux (gcc-11, ubuntu-22.04, RelWithDebInfo, 4.1.1, 1.74.0)	20m 36s
Linux (gcc-14, ubuntu-24.04, Debug)	9m 6s
Linux (clang-21, ubuntu-latest, Debug, true)	1m 54s
Linux (clang-18, ubuntu-24.04, Debug, true)	8m 46s
	2h 39m 22s

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