Introduce reusable tree model #165

Job	Run time
build (5.15.2, windows-msvc, windows-2022)	2m 27s
build (5.15.2, windows-mingw, windows-2022, win64_mingw81, win64_mingw, -DCMAKE_C_COMPILER:FILEPA...	1m 4s
build (5.15.2, linux, ubuntu-22.04, -GNinja)	1m 49s
build (5.15.2, android, ubuntu-22.04, android, android, android_arm64_v8a, -DANDROID_ABI:STRING=a...	1m 49s
build (5.15.2, macos, macos-12)	1m 30s
build (5.15.2, ios, macos-12, ios, -DCMAKE_FIND_ROOT_PATH:PATH=$Qt5_DIR$Qt6_DIR, -DCMAKE_PREFIX_P...	4m 37s
build (6.5.3, windows-msvc, windows-2022)	2m 40s
build (6.5.3, windows-mingw, windows-2022, win64_mingw81, win64_mingw, -DCMAKE_C_COMPILER:FILEPAT...	1m 17s
build (6.5.3, linux, ubuntu-22.04, -GNinja)	1m 51s
build (6.5.3, android, ubuntu-22.04, android, android, android_arm64_v8a, -DANDROID_ABI:STRING=ar...	2m 15s
build (6.5.3, macos, macos-12)	2m 8s
build (6.5.3, ios, macos-12, ios, -DCMAKE_FIND_ROOT_PATH:PATH=$Qt5_DIR$Qt6_DIR, -DCMAKE_PREFIX_PA...	4m 9s
	27m 36s

Provide feedback