doc: split up yambar-modules

Closes #15

doc/yambar-modules-xkb.5.scd

@@ -0,0 +1,51 @@
+yambar-modules-xkb(5)
+
+# NAME
+xkb - This module monitors the currently active XKB keyboard layout
+
+# DESCRIPTION
+
+This module monitors the currently active XKB keyboard layout and
+lock-key states.
+
+Note: this module is X11 only. It does not work in Wayland.
+
+# TAGS
+
+[[ *Name*
+:[ *Type*
+:[ *Description*
+|  name
+:  string
+:  Name of currently selected layout, long version (e.g. "English (US)")
+|  symbol
+:  string
+:  Name of currently selected layout, short version (e.g. "us")
+|  caps_lock
+:  bool
+:  True if *CapsLock* is enabled
+|  num_lock
+:  bool
+:  True if *NumLock* is enabled
+|  scroll_lock
+:  bool
+:  True if *ScrollLock* is enabled
+
+# CONFIGURATION
+
+No additional attributes supported, only the generic ones (see
+*GENERIC CONFIGURATION* in *yambar-modules*(5))
+
+# EXAMPLES
+
+```
+bar:
+  left:
+    - xkb:
+        content:
+          string: {text: "{symbol}"}
+```
+
+# SEE ALSO
+
+*yambar-modules*(5), *yambar-particles*(5), *yambar-tags*(5), *yambar-decorations*(5)