Lights without geometry shader

[einarf]

No description provided.

[Copilot]

Pull Request Overview

This PR replaces the existing geometry‐shader–based point light rendering with instanced quads generated in the vertex shader and updates the Python client code accordingly.

• Point light vertex shader now handles per‐instance data and quad expansion.
• Geometry shader file removed.
• Python lights.py updated to use instanced TRIANGLE_STRIP rendering and renamed uniform.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
arcade/resources/system/shaders/lights/point_lights_vs.glsl	Switched to instanced attributes, added offset uniform, outputs UV/color/attenuation
arcade/resources/system/shaders/lights/point_lights_geo.glsl	Removed unused geometry shader
arcade/resources/system/shaders/lights/point_lights_fs.glsl	Minor formatting adjustment
arcade/future/light/lights.py	Updated VAO setup for instancing, removed geometry shader usage, changed render call