Add feature for cursor and range rings

build/shaders/ppi_cursor.frag

@@ -0,0 +1,6 @@
+#version 330 core
+uniform vec3 uColor;
+out vec4 FragColor;
+void main() {
+    FragColor = vec4(uColor, 1.0);
+}

build/shaders/ppi_cursor.vert

@@ -0,0 +1,5 @@
+#version 330 core
+layout(location = 0) in vec2 aPos;
+void main() {
+    gl_Position = vec4(aPos, 0.0, 1.0);
+}