Initial procedural 3D engine setup

- Updated README.md with modern project structure and features
- Cleaned up Android build files (not needed for desktop engine)
- Restructured as procedural 3D engine with ImGui integration
- Based on Sascha Willems Vulkan framework with dynamic rendering
- Added comprehensive build instructions and camera system docs

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

base/foundation/VulkanUIOverlay.h

@@ -0,0 +1,98 @@
+/*
+* UI overlay class using ImGui
+*
+* Copyright (C) 2017-2024 by Sascha Willems - www.saschawillems.de
+*
+* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+*/
+
+#pragma once
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <vector>
+#include <sstream>
+#include <iomanip>
+
+#include <vulkan/vulkan.h>
+#include "../core/VulkanTools.h"
+#include "../core/VulkanDebug.h"
+#include "../memory/VulkanBuffer.h"
+#include "../device/VulkanDevice.h"
+
+#include "../external/imgui/imgui.h"
+
+#if defined(__ANDROID__)
+#include "VulkanAndroid.h"
+#endif
+
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#endif
+
+namespace vks
+{
+	class UIOverlay
+	{
+	public:
+		vks::VulkanDevice* device{ nullptr };
+		VkQueue queue{ VK_NULL_HANDLE };
+
+		VkSampleCountFlagBits rasterizationSamples{ VK_SAMPLE_COUNT_1_BIT };
+		uint32_t subpass{ 0 };
+
+		vks::Buffer vertexBuffer;
+		vks::Buffer indexBuffer;
+		int32_t vertexCount{ 0 };
+		int32_t indexCount{ 0 };
+
+		std::vector<VkPipelineShaderStageCreateInfo> shaders;
+
+		VkDescriptorPool descriptorPool{ VK_NULL_HANDLE };
+		VkDescriptorSetLayout descriptorSetLayout{ VK_NULL_HANDLE };
+		VkDescriptorSet descriptorSet{ VK_NULL_HANDLE };
+		VkPipelineLayout pipelineLayout{ VK_NULL_HANDLE };
+		VkPipeline pipeline{ VK_NULL_HANDLE };
+
+		VkDeviceMemory fontMemory{ VK_NULL_HANDLE };
+		VkImage fontImage{ VK_NULL_HANDLE };
+		VkImageView fontView{ VK_NULL_HANDLE };
+		VkSampler sampler{ VK_NULL_HANDLE };
+
+		struct PushConstBlock {
+			glm::vec2 scale;
+			glm::vec2 translate;
+		} pushConstBlock;
+
+		bool visible{ true };
+		bool updated{ false };
+		float scale{ 1.0f };
+		float updateTimer{ 0.0f };
+
+		UIOverlay();
+		~UIOverlay();
+
+		void preparePipeline(const VkPipelineCache pipelineCache, const VkRenderPass renderPass, const VkFormat colorFormat, const VkFormat depthFormat);
+		void prepareResources();
+
+		bool update();
+		void draw(const VkCommandBuffer commandBuffer);
+		void resize(uint32_t width, uint32_t height);
+
+		void freeResources();
+
+		bool header(const char* caption);
+		bool checkBox(const char* caption, bool* value);
+		bool checkBox(const char* caption, int32_t* value);
+		bool radioButton(const char* caption, bool value);
+		bool inputFloat(const char* caption, float* value, float step, uint32_t precision);
+		bool sliderFloat(const char* caption, float* value, float min, float max);
+		bool sliderInt(const char* caption, int32_t* value, int32_t min, int32_t max);
+		bool comboBox(const char* caption, int32_t* itemindex, std::vector<std::string> items);
+		bool button(const char* caption);
+		bool colorPicker(const char* caption, float* color);
+		void text(const char* formatstr, ...);
+	};
+}