Initial public source release

Split reusable rendering and format support into vectorail-core and vectorail-gc.

apps/desktop/shaders/particle.vert

@@ -0,0 +1,17 @@
+#version 450 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec2 aOffset; // Смещение углов квадрата
+layout (location = 2) in float aLife;
+
+uniform mat4 uProjection;
+uniform mat4 uView;
+
+out float vLife;
+
+void main() {
+    vLife = aLife;
+    vec4 viewPos = uView * vec4(aPos, 1.0);
+    // Billboard: квадрат всегда смотрит на камеру
+    viewPos.xy += aOffset * aLife * 0.5;
+    gl_Position = uProjection * viewPos;
+}