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/Measure.cpp

@@ -1,3 +1,5 @@
+#include "Point.hpp"
+#include "TriangleMesh.hpp"
 #include "libslic3r/libslic3r.h"
 #include "Measure.hpp"
 #include "MeasureUtils.hpp"
@@ -6,8 +8,28 @@
 #include "libslic3r/SurfaceMesh.hpp"
 
 
+#include <cstdlib>
+#include <limits>
+#include <array>
+#include <cstddef>
+#include <algorithm>
+#include <cassert>
+#include <boost/container/small_vector.hpp>
+#include <Eigen/Geometry>
+#include <cmath>
+#include <math.h>
+#include <iterator>
+#include <memory>
+#include <iostream>
+#include <Eigen/Core>
+#include <cstdint>
 #include <numeric>
+#include <optional>
+#include <set>
 #include <tbb/parallel_for.h>
+#include <tuple>
+#include <vector>
+#include <utility>
 
 #define DEBUG_EXTRACT_ALL_FEATURES_AT_ONCE 0