début renderer

assets/shaders/README.md

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+# Shaders Directory
+
+Contains WGSL shader source files compiled at runtime by wgpu. Each file defines vertex and fragment stages for a specific rendering pipeline.
+
+## Files
+
+- **basic_shader.wgsl** — Simple triangle shader used as a minimal example. Renders a solid red triangle using hardcoded positions computed entirely on the GPU side.