got basic ui elmental interaction working, + alignment of anchor

code/input.odin

@@ -17,10 +17,18 @@ btn_pressed :: proc( btn : DigitalBtn ) -> b32 {
 	return btn.ended_down && btn.half_transitions > 0
 }
 
+btn_released :: proc ( btn : DigitalBtn ) -> b32 {
+	return btn.ended_down == false && btn.half_transitions > 0
+}
+
 pressed :: proc {
 	btn_pressed,
 }
 
+released :: proc {
+	btn_released,
+}
+
 MaxKeyboardKeys :: 256
 KeyboardKey :: enum u32 {
 	null = 0x00,