Fix color blending (component VAO), add config.hpp

manifest.md

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+# UUI : micro UI Toolkit
+
+
+* C++ + Vulkan/OpenGL
+
+* Python binding
+
+* Ease of use : safe and good semantic
+
+* Let custom rendering
+
+
+## Technical
+
+* minimum ressource : CPU/memory
+
+* minimum redraw
+
+* core profile : no immediate mode
+
+* Object based
+
+* Init/Render lambda
+
+* Opengl context
+
+
+## Layout / Style
+
+* Constraint based? padding/margin?