ADD: Readme and LICENSE

Readme.md

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+# CopernicusEngine
+Multi-purpose Vulkan render engine specialized for physics simulation and solar system visualization
+
+## Introduction
+Work-In-Progress Vulkan render engine
+Current structure:
+- Flexible render graph system with multiple render passes
+- Deferred rendering
+- PBR(IBL is WIP), shadow, 
+- GLTF loading and rendering, primitive creation and rendering.
+
+Work-In-Progress
+- [ ] IBL
+- [ ] TAA
+- [ ] Multiple light
+- [ ] SSR
+- [ ] SSAO, bloom
+- [ ] Planet Rendering