fix: move wlxoverlay and wlxoverlay-x as their own files

content/docs/fossvr/wlxoverlay-x.md

@@ -0,0 +1,24 @@
+---
+weight: 300
+title: WlxOverlay-X
+---
+
+# WlxOverlay-X
+
+- [WlxOverlay-X GitHub repository](https://github.com/galister/wlx-overlay-x)
+
+{{< hint danger >}}
+**Warning**
+
+WlxOverlay-X is still to be considered alpha-quality and highly experimental.
+{{< /hint >}}
+
+WlxOverlay-X is the OpenXR edition of WlxOverlay, the tool that lets users interact with their X11 or Wayland desktop from inside VR.
+
+It supports a vast variety of desktop environments, and comes with a fully customizable keyboard.
+
+WlxOverlay-X works on any runtime that implements EXTX_OVERLAY. Currently this is limited to Monado-based runtimes.
+
+WiVRn users: while WiVRn supports EXTX_OVERLAY, it does no frame composition on the server side, so overlay apps can have ghosting issues.
+
+If you are looking for an overlay for SteamVR, see [WlxOverlay](/docs/steamvr/wlxoverlay/).