Add keymapnotify patch

keymapnotify.md

@@ -0,0 +1,22 @@
+### Description
+Once keyboard layout is changed, write it to a file and run a command.
+
+It can be used to notify a status bar to display current keyboard layout.
+You can modify `keymapnotifycmd` setting to change which program to signal and
+the signal value itself.
+
+Example [someblocks](https://sr.ht/~raphi/someblocks) config that works with
+the default patch settings:
+
+```c
+static const Block blocks[] = {
+	/*Icon*/	/*Command*/		/*Update Interval*/	/*Update Signal*/
+	{"", "cat /tmp/dwl-keymap",					0,		1},
+};
+```
+
+### Download
+- [2023-05-26](https://github.com/djpohly/dwl/compare/main...NikitaIvanovV:keymapnotify.patch)
+
+### Authors
+- [Nikita Ivanov](https://github.com/NikitaIvanovV)