Add WebGL compatibility

src/graphics/rendering/shaders/distance-vs-100.glsl

@@ -0,0 +1,15 @@
+#version 100
+
+precision lowp float;
+
+uniform mat3 modelTransform;
+uniform vec2 squareToAspectRatio;
+
+attribute vec4 vertexPosition;
+varying vec2 position;
+
+void main() {
+    vec3 vertexPosition2D = vec3(vertexPosition.xy, 1.0) * modelTransform;
+    gl_Position = vec4(vertexPosition2D.xy, 0.0, 1.0);
+    position = vertexPosition2D.xy * squareToAspectRatio;
+}