Fix std::setw and std::setfill declarations

[128/471] Building CXX object src/libslic3r/CMakeFiles/libslic3r.dir/GCode/ConflictChecker.cpp.o
FAILED: src/libslic3r/CMakeFiles/libslic3r.dir/GCode/ConflictChecker.cpp.o
/run/ccache/bin/c++ -DBOOST_ATOMIC_NO_LIB -DBOOST_CHRONO_NO_LIB -DBOOST_DATE_TIME_NO_LIB -DBOOST_FILESYSTEM_NO_LIB -DBOOST_IOSTREAMS_NO_LIB -DBOOST_LOCALE_NO_LIB -DBOOST_LOG_NO_LIB -DBOOST_REGEX_NO_LIB -DBOOST_SYSTEM_NO_LIB -DBOOST_THREAD_NO_LIB -DHAVE_FREETYPE -DHAVE_OPENGL_EXT -DHAVE_XLIB -DLIBNEST2D_GEOMETRIES_libslic3r -DLIBNEST2D_OPTIMIZER_nlopt -DLIBNEST2D_STATIC -DLIBNEST2D_THREADING_tbb -DOCC_CONVERT_SIGNALS -DOPENVDB_OPENEXR_STATICLIB -DOPENVDB_STATICLIB -DSLIC3R_GUI -DTBB_USE_CAPTURED_EXCEPTION=0 -DUNICODE -DUSE_TBB -DWXINTL_NO_GETTEXT_MACRO -D_UNICODE -DwxNO_UNSAFE_WXSTRING_CONV -DwxUSE_UNICODE -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/run/build/BambuStudio/src -I/run/build/BambuStudio/build/src/platform -I/run/build/BambuStudio/src/libslic3r -I/run/build/BambuStudio/build/src/libslic3r -I/run/build/BambuStudio/deps/build/destdir/usr/local/include/opencascade -I/run/build/BambuStudio/src/libnest2d/include -I/run/build/BambuStudio/src/miniz -I/run/build/BambuStudio/src/glu-libtess/include -I/run/build/BambuStudio/src/clipper2/Clipper2Lib/include -isystem /run/build/BambuStudio/src/eigen -isystem /run/build/BambuStudio/src/libigl -isystem /run/build/BambuStudio/deps/build/destdir/usr/local/include -isystem /run/build/BambuStudio/deps/build/destdir/usr/local/include/boost-1_78 -isystem /run/build/BambuStudio/deps/build/destdir/usr/local/include/OpenEXR -O2 -pipe -g -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer -fext-numeric-literals -Wall -Wno-reorder -O3 -DNDEBUG -std=gnu++17 -fPIC -fsigned-char -Werror=return-type -Wno-ignored-attributes -Wno-unknown-pragmas -DOPENVDB_ABI_VERSION_NUMBER=8 -MD -MT src/libslic3r/CMakeFiles/libslic3r.dir/GCode/ConflictChecker.cpp.o -MF src/libslic3r/CMakeFiles/libslic3r.dir/GCode/ConflictChecker.cpp.o.d -o src/libslic3r/CMakeFiles/libslic3r.dir/GCode/ConflictChecker.cpp.o -c /run/build/BambuStudio/src/libslic3r/GCode/ConflictChecker.cpp
In file included from /run/build/BambuStudio/src/libslic3r/GCode/ConflictChecker.hpp:4,
                 from /run/build/BambuStudio/src/libslic3r/GCode/ConflictChecker.cpp:1:
/run/build/BambuStudio/src/libslic3r/GCode/../Utils.hpp: In function ‘std::string Slic3r::convert_to_full_version(std::string)’:
/run/build/BambuStudio/src/libslic3r/GCode/../Utils.hpp:110:24: error: ‘setw’ is not a member of ‘std’
  110 |             ss << std::setw(2) << std::setfill('0') << items[i];
      |                        ^~~~
/run/build/BambuStudio/src/libslic3r/GCode/../Utils.hpp:15:1: note: ‘std::setw’ is defined in header ‘<iomanip>’; did you forget to ‘#include <iomanip>’?
   14 | #include "libslic3r.h"
  +++ |+#include <iomanip>
   15 |
/run/build/BambuStudio/src/libslic3r/GCode/../Utils.hpp:110:40: error: ‘setfill’ is not a member of ‘std’
  110 |             ss << std::setw(2) << std::setfill('0') << items[i];
      |                                        ^~~~~~~
/run/build/BambuStudio/src/libslic3r/GCode/../Utils.hpp:110:40: note: ‘std::setfill’ is defined in header ‘<iomanip>’; did you forget to ‘#include <iomanip>’?

src/libslic3r/Utils.hpp

@@ -1,6 +1,7 @@
 #ifndef slic3r_Utils_hpp_
 #define slic3r_Utils_hpp_
 
+#include <iomanip>
 #include <locale>
 #include <utility>
 #include <functional>