Add CLAUDE.md with project architecture and build guide

[Energy0124]

Summary

• Adds CLAUDE.md to document the Enix game engine for AI-assisted development
• Covers build instructions (CMake configs, shader compilation), subsystem architecture table, render pipeline overview, code conventions, asset paths, third-party libraries, and planned features

What's in CLAUDE.md

• Build — CMake commands, debug configs (CLion, MinGW, MSVC), shader pipeline via glslc
• Architecture — subsystem table (Render/, Core/, Asset/, Input/, UI/), two-pass render pipeline (Blinn-Phong + ImGui), double-buffering, UBO layout
• Code conventions — _ member prefix, singleton pattern, non-copyable render objects, #pragma once
• Third-party — glfw, glm, imgui, spdlog, stb_image, tinyobjloader
• Asset paths — runtime resolution relative to bin/
• Planned features — mouse input, skybox, PBR, physics, audio, and more

Test plan

• Verify CLAUDE.md renders correctly on GitHub
• Confirm build commands are accurate against CMakeLists.txt

🤖 Generated with Claude Code

[Energy0124]

@copilot Review this change

[Copilot]

@Energy0124 I've opened a new pull request, #2, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

Pull request overview

This PR adds comprehensive documentation for AI-assisted development in the Enix game engine project. The CLAUDE.md file serves as a reference guide covering build instructions, architecture, coding conventions, and third-party dependencies to help AI tools understand the codebase structure.

Changes:

• Adds CLAUDE.md with detailed documentation covering build process (CMake, shader compilation), subsystem architecture, render pipeline, code conventions, third-party libraries, asset paths, and planned features

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 3 comments.

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[Copilot]

VulkanEngine.h/.cpp is described here as a “singleton engine”, but the constructor is public and the static _instance is simply overwritten in the constructor (so multiple instances can exist sequentially). Consider rewording this to “intended singleton / global instance pointer” unless the code enforces singleton semantics.