common improvements (#366)

- std container replacements for vector, unordered_map, unordered_set
  - unordered_map and unordered_set replaced with ska::flat_hash_map
  - vector replacement is still std::
- unordered_map performance test (std:: vs ska::)
- backlog improvements
- wiArchive improvements
- editor: added option to dump scene to C++ header file
- common improvements, refactors

Editor/PaintToolWindow.cpp

@@ -3,7 +3,6 @@
 #include "PaintToolWindow.h"
 #include "shaders/ShaderInterop_Renderer.h"
 
-#include <sstream>
 #include <cmath>
 
 using namespace wiECS;
@@ -179,7 +178,7 @@ void PaintToolWindow::Create(EditorComponent* editor)
 
 		uint64_t sel = textureSlotComboBox.GetItemUserData(textureSlotComboBox.GetSelected());
 
-		std::vector<uint8_t> texturefiledata;
+		wi::vector<uint8_t> texturefiledata;
 		if (wiHelper::saveTextureToMemoryFile(editTexture, "PNG", texturefiledata))
 		{
 			material->textures[sel].resource->filedata = texturefiledata;
@@ -548,7 +547,7 @@ void PaintToolWindow::Update(float dt)
 				size_t ind;
 				float affection;
 			};
-			static std::vector<PaintVert> paintindices;
+			static wi::vector<PaintVert> paintindices;
 			paintindices.clear();
 			paintindices.reserve(mesh->vertex_positions.size());