Initial public source release

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

apps/desktop/shaders/note.vert

@@ -0,0 +1,14 @@
+#version 450 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec2 aUv;
+
+uniform mat4 uProjection;
+uniform mat4 uView;
+uniform vec4 uUvRect;
+
+out vec2 vUv;
+
+void main() {
+    vUv = uUvRect.xy + aUv * uUvRect.zw;
+    gl_Position = uProjection * uView * vec4(aPos, 1.0);
+}