feat: Initial commit with Jolt Physics, AI, Networking backends and py3dgame Python package

Author: PythonCoders45

.gitignore

@@ -0,0 +1,18 @@
+cat << 'EOF' > .gitignore
+# Compiled binaries & C++ libraries
+*.so
+*.dll
+*.dylib
+*.a
+*.o
+
+# Python build artifacts
+__pycache__/
+*.pyc
+*.egg-info/
+dist/
+build/
+
+# Temporary vendor files
+vendor_tmp/
+EOF

ai/CMakeLists.txt

@@ -0,0 +1,55 @@
+
+add_library(Recast)
+add_library(RecastNavigation::Recast ALIAS Recast)
+
+set_target_properties(Recast PROPERTIES
+    DEBUG_POSTFIX -d
+    SOVERSION ${SOVERSION}
+    VERSION ${LIB_VERSION}
+    COMPILE_PDB_OUTPUT_DIRECTORY .
+    COMPILE_PDB_NAME "Recast-d"
+    CXX_STANDARD 98
+    CXX_STANDARD_REQUIRED ON
+    CXX_EXTENSIONS OFF  # Disable compiler-specific extensions
+)
+
+target_compile_definitions(Recast PUBLIC "$<$<NOT:${RECASTNAVIGATION_ENABLE_ASSERTS}>:RC_DISABLE_ASSERTS>")
+
+target_include_directories(Recast PUBLIC
+    "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/Include>"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation>"
+)
+
+target_sources(Recast PRIVATE
+    Source/Recast.cpp
+    Source/RecastAlloc.cpp
+    Source/RecastArea.cpp
+    Source/RecastAssert.cpp
+    Source/RecastContour.cpp
+    Source/RecastFilter.cpp
+    Source/RecastLayers.cpp
+    Source/RecastMesh.cpp
+    Source/RecastMeshDetail.cpp
+    Source/RecastRasterization.cpp
+    Source/RecastRegion.cpp
+)
+
+install(TARGETS Recast
+    EXPORT recastnavigation-targets
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT library
+    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} ${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation
+)
+
+install(DIRECTORY Include/ 
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation
+    FILES_MATCHING PATTERN "*.h"
+)
+
+if(MSVC)
+    install(FILES "$<TARGET_FILE_DIR:Recast>/Recast-d.pdb"
+        CONFIGURATIONS "Debug"
+        DESTINATION "lib"
+        OPTIONAL)
+endif()