doc: split up yambar-modules

Closes #15

doc/yambar-modules-xwindow.5.scd

@@ -0,0 +1,44 @@
+yambar-modules-xwindow(5)
+
+# NAME
+xwindow - This module provides the application name and window title
+
+# DESCRIPTION
+
+This module provides the application name and window title of the
+currently focused window.
+
+Note: this module is X11 only. It does not work in Wayland. If you are
+running Sway, take a look at the *i3* module and its _application_ and
+_title_ tags.
+
+# TAGS
+
+[[ *Name*
+:[ *Type*
+:[ *Description*
+|  application
+:  string
+:  Name of the application that owns the currently focused window
+|  title
+:  string
+:  The title of the currently focused window
+
+# CONFIGURATION
+
+No additional attributes supported, only the generic ones (see
+*GENERIC CONFIGURATION* in *yambar-modules*(5))
+
+# EXAMPLES
+
+```
+bar:
+  left:
+    - xwindow:
+        content:
+          string: {text: "{application}: {title}"}
+```
+
+# SEE ALSO
+
+*yambar-modules*(5), *yambar-particles*(5), *yambar-tags*(5), *yambar-decorations*(5)