Add Missing Includes Across the Remaining Sources and Tests (#16071)

* Ignore Clipper, libpng, mcut and Boost.Polygon Internals in clang-tidy

Each only works through a wrapper or umbrella header: libslic3r/clipper.hpp or clipper_z.hpp configure Clipper before including it, png.h pulls in libpng's config headers, and Boost.Polygon's headers only compile through polygon.hpp or voronoi.hpp.

* Ignore minilzo's Config Headers in clang-tidy

lzoconf.h and lzodefs.h are internal to minilzo.h, which is what the code includes.

* Add Missing Includes Across the Remaining Sources and Tests

Covers src/slic3r/Utils, src/slic3r/plugin, src/slic3r/Config, src/libvgcode, src/dev-utils, src/OrcaSlicer.cpp and tests/, the directories left after src/slic3r/GUI and src/libslic3r. Generated with clang-tidy misc-include-cleaner. libvgcode's own headers are included by relative path as in the rest of that library, and Catch2 and pybind11 with angle brackets as elsewhere in the repo.

* Make the GUI and Test Headers Compile on Their Own

Each now includes, or forward-declares, what it uses instead of relying on what its includers happened to include first. Headers that only compile on one platform, or that nothing built includes, are left alone.

* Keep Windows and nanosvg Setup Ahead of the Added Includes

OrcaSlicer.cpp and several tests set _WIN32_WINNT, WIN32_LEAN_AND_MEAN or NOMINMAX before including Windows.h, and the profile validator defines NANOSVG_IMPLEMENTATION before any libslic3r header. The added includes had landed above those blocks, which broke the Windows build.

* Add the GUI Includes the First Pass Missed

Covers headers that only became editable once they compiled on their own, and wx symbols whose suggested header changed as the clang-tidy ignore list grew after the src/slic3r/GUI pass.

* Keep the Added Test Includes Below the NOMINMAX Guard

test_marchingsquares.cpp and test_texture_displacement.cpp had includes inside #ifndef NOMINMAX, which the tests inherit as defined on Windows from libslic3r, so those were skipped there. .clang-tidy also ignores the MSVC STL and UCRT internals, Boost.Multiprecision's fwd.hpp and CPython's Windows include directory, as in #16068.

tests/libslic3r/test_3mf.cpp

@@ -1,4 +1,9 @@
 
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/generators/catch_generators.hpp>
+#include <catch2/catch_message.hpp>
+#include <catch2/matchers/catch_matchers.hpp>
+#include <catch2/matchers/catch_matchers_floating_point.hpp>
 #include "libslic3r/Model.hpp"
 #include "libslic3r/Format/3mf.hpp"
 #include "libslic3r/Format/bbs_3mf.hpp"
@@ -14,6 +19,15 @@
 
 #include "test_utils.hpp"
 
+#include "libslic3r/Config.hpp"
+#include "libslic3r/Geometry.hpp"
+#include <cstddef>
+#include <miniz.h>
+#include "libslic3r/TriangleMesh.hpp"
+#include "libslic3r/TriangleSelector.hpp"
+#include <memory>
+#include <cstdint>
+#include <ios>
 #include <nlohmann/json.hpp>
 
 #include <boost/filesystem/operations.hpp>
@@ -25,8 +39,12 @@
 #include <catch2/catch_tostring.hpp>
 #include <Eigen/Core>
 #include <Eigen/Geometry>
+#include <string>
+#include <sstream>
 #include <type_traits> // for std::enable_if_t
 #include <typeinfo>    // for typeid
+#include <vector>
+#include <utility>
 
 namespace Catch {
     template <typename T>