Build

Add new tool gui/siegemanager #6104

Job	Run time
docs / Build linux64	1m 40s
lint / lint	48s
test / Windows MSVC / Build win64	7m 38s
test / Linux gcc-12 / Build linux64	3m 36s
test / Linux gcc-10 / Build linux64	1m 58s
test / Run Linux test suite (gcc-12, all plugins) / Test (ubuntu, gcc-12, all plugins, default config)	1m 6s
test / Run Linux test suite / Test (ubuntu, gcc-10, default plugins, default config)	1m 0s
test / Run Windows test suite / Test (windows, msvc, default plugins, default config)	1m 23s
test / Run Windows test suite (empty config) / Test (windows, msvc, default plugins, empty config)	1m 31s
	20m 40s

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