Move Clipper2 dependency to deps_src directory (#11736)

Relocated Clipper2 source files and CMake configuration from src/clipper2 to deps_src/clipper2. Updated CMakeLists to add Clipper2 as a dependency from the new location, improving dependency organization.

Co-authored-by: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>

deps_src/CMakeLists.txt

@@ -17,6 +17,7 @@ add_subdirectory(stb_dxt)     # Header-only STB DXT compression library
 add_subdirectory(Shiny)
 add_subdirectory(admesh)
 add_subdirectory(clipper)
+add_subdirectory(clipper2)
 add_subdirectory(expat)
 add_subdirectory(glu-libtess)
 add_subdirectory(hidapi)

src/CMakeLists.txt

@@ -6,8 +6,6 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # Include dev-utils for encoding check and other utilities
 add_subdirectory(dev-utils)
-# Clipper2 math utils
-add_subdirectory(clipper2)
 # add_subdirectory(avrdude)
 # Note: semver and hints are now included from deps_src/CMakeLists.txt