Add an option to skip the hotkey overlay at startup

resources/default-config.kdl

@@ -179,6 +179,12 @@ screenshot-path "~/Pictures/Screenshots/Screenshot from %Y-%m-%d %H-%M-%S.png"
 // You can also set this to null to disable saving screenshots to disk.
 // screenshot-path null
 
+// Settings for the "Important Hotkeys" overlay.
+hotkey-overlay {
+    // Uncomment this line if you don't want to see the hotkey help at niri startup.
+    // skip-at-startup
+}
+
 binds {
     // Keys consist of modifiers separated by + signs, followed by an XKB key name
     // in the end. To find an XKB name for a particular key, you may use a program