docs: beets, khal, nemo, wf-recorder

.dotfiles/docs/khal.md

@@ -0,0 +1,10 @@
+# Khal
+
+## Get only next event
+
+```
+# -df "": Show empty day headers
+# grep -v "^ ": remove all-day events
+# head -n 1: Get only the first item
+khal list now -df "" | grep -v "^ " | head -n 1
+```