General: Include necessary includes

Ensures all necessary includes are included and also removes headers
that aren't necessary

hecl/lib/Blender/MeshOptimizer.hpp

@@ -1,6 +1,14 @@
 #pragma once
+
+#include <algorithm>
+#include <array>
+#include <cstddef>
+#include <cstdint>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
 #include "hecl/Blender/Connection.hpp"
-#include <unordered_set>
 
 namespace hecl::blender {