Lagrange Release v5.5.0

Features/bugfixes

• Thicken mesh: add segments along stitch
• Colorspace fixes in the UI module

Dependencies

• Updated ImGui to 1.85

Infrastructure

• Migrate binary unit test data to msgpack
• Hide slow tests in Debug mode
• Fix CMake options for subproject use
• Add CMake option to use ccache (ON by default if ccache is found)​
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