fix the clang CI build

Every module unit now includes the standard headers it uses. Declarations
reaching a unit only through an imported module's global module fragment
are reachable but not visible, so ADL misses the free operators older
libstdc++ declares beside a type - reproduced on ubuntu 24.04 (libstdc++
13), where gl/vao.cpp could not compare vector iterators.

Also drops a stale editor/editorSettings.hpp from the MSVC source list,
which broke the Windows configure step, silences the deliberate
include-in-purview warning in the glm wrapper, and removes GCC support:
clang or MSVC only.

scene/scene.cpp

@@ -1,4 +1,11 @@
 module;
+#include <functional>
+#include <array>
+#include <fstream>
+#include <ios>
+#include <stack>
+#include <unordered_map>
+#include <unordered_set>
 #include "utilities/utilities_macros.h"
 #include "glad/glad.h"
 #include <GLFW/glfw3.h>

scene/scene.cppm

@@ -1,4 +1,10 @@
 module;
+#include <cstddef>
+#include <functional>
+#include <istream>
+#include <ostream>
+#include <string>
+#include <tuple>
 #include <iosfwd>
 #include <cmath>
 #include <vector>

scene/sceneeditor.cpp

@@ -1,4 +1,5 @@
 module;
+#include <string>
 #include <algorithm>
 #include <cmath>
 #include <iterator>

scene/scenenode.cpp

@@ -1,4 +1,5 @@
 module;
+#include <sstream>
 #include "glad/glad.h"
 #include <algorithm>
 #include <cmath>

scene/scenenode.cppm

@@ -1,4 +1,6 @@
 module;
+#include <cstddef>
+#include <limits>
 #include "global_include/interfaces/ITexture_macros.h"
 #include <istream>
 #include <ostream>

scene/scenenodegroups.cpp

@@ -1,4 +1,6 @@
 module;
+#include <stack>
+#include <vector>
 #include <algorithm>
 #include "utilities/Globals_macros.h"
 #include <cstddef>

scene/sn_utils.cpp

@@ -1,4 +1,6 @@
 module;
+#include <limits>
+#include <string>
 #include <cstdint>
 #include <istream>
 #include <ostream>

scene/sn_utils.cppm

@@ -2,6 +2,8 @@
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 module;
+#include <istream>
+#include <ostream>
 #include <string>
 #include <cstdint>