Add stubs (i.e type hints)

CMakeLists.txt

@@ -16,18 +16,19 @@ find_package(nanobind CONFIG REQUIRED)
 
 nanobind_add_module(pgeof_ext NOMINSIZE STABLE_ABI LTO src/pgeof_ext.cpp)
 
-# for nanobind 2
-# nanobind_add_stub(
-#   pgeof_ext_stub
-#   MODULE pgeof_ext
-#   OUTPUT pgeof_ext.pyi
-#   PYTHON_PATH $<TARGET_FILE_DIR:pgeof_ext>
-#   DEPENDS pgeof_ext
-# )
+nanobind_add_stub(
+   pgeof_ext_stub
+   MODULE pgeof_ext
+   OUTPUT pgeof_ext.pyi
+   MARKER_FILE py.typed
+   PYTHON_PATH $<TARGET_FILE_DIR:pgeof_ext>
+   DEPENDS pgeof_ext
+)
 
 # All lib are headeer only. 
 # it's faster to include like this than using exported targets 
 # (i.e add_subdirectories(...))
 target_include_directories(pgeof_ext PRIVATE "include" "third_party/eigen" "third_party/nanoflann/include" "third_party/taskflow") 
 
-install(TARGETS pgeof_ext LIBRARY DESTINATION pgeof)
+install(TARGETS pgeof_ext LIBRARY DESTINATION pgeof)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/pgeof_ext.pyi ${CMAKE_CURRENT_BINARY_DIR}/py.typed DESTINATION pgeof)