cursor: move to a hyprland impl

This moves wlr_cursor to a completely new impl mostly under
CPointerManager

Also adds beginSimple to OpenGL for simple render passes (e.g. cursor)

src/devices/IPointer.cpp

@@ -3,3 +3,7 @@
 uint32_t IPointer::getCapabilities() {
     return HID_INPUT_CAPABILITY_POINTER;
 }
+
+eHIDType IPointer::getType() {
+    return HID_TYPE_POINTER;
+}