Add Missing Includes Across src/libslic3r

Every libslic3r source and header now directly includes the headers declaring what it uses, rather than relying on the precompiled header or transitive includes. Generated with clang-tidy misc-include-cleaner, with libslic3r headers spelled libslic3r/... so they resolve outside the library's private include paths. MultiMaterialSegmentation.hpp, Support/SupportParameters.hpp and Format/STEP.hpp are made self-contained by hand.

src/libslic3r/Print.cpp

@@ -1,3 +1,52 @@
+#include "PrintBase.hpp"
+#include <utility>
+#include <string>
+#include <mutex>
+#include <vector>
+#include "libslic3r.h"
+#include "calib.hpp"
+#include <cassert>
+#include "CustomGCode.hpp"
+#include "ObjectID.hpp"
+#include <cstddef>
+#include "Point.hpp"
+#include "Polygon.hpp"
+#include "Geometry.hpp"
+#include <map>
+#include <cmath>
+#include <Eigen/Geometry>
+#include <set>
+#include "Slicing.hpp"
+#include <cstdlib>
+#include "TriangleSelector.hpp"
+#include "GCode/AdaptivePAProcessor.hpp"
+#include <exception>
+#include <ostream>
+#include "ExPolygon.hpp"
+#include "Layer.hpp"
+#include "FilamentGroup.hpp"
+#include <memory>
+#include "FilamentGroupUtils.hpp"
+#include "MultiNozzleUtils.hpp"
+#include <chrono>
+#include <optional>
+#include "GCode/GCodeProcessor.hpp"
+#include "GCode/ThumbnailData.hpp"
+#include "ExtrusionEntity.hpp"
+#include <math.h>
+#include "CommonDefs.hpp"
+#include <ios>
+#include <iomanip>
+#include <tuple>
+#include "Surface.hpp"
+#include "Circle.hpp"
+#include "Polyline.hpp"
+#include "ArcFitter.hpp"
+#include <cstdio>
+#include <boost/filesystem/operations.hpp>
+#include <boost/thread/lock_types.hpp>
+#include <iterator>
+#include "TriangleMesh.hpp"
 #ifdef _WIN32
 // Keep this first. A header below reaches boost/regex, whose w32_regex_traits
 // needs the Win32 types declared already.