kdocker: add page (#6044)

pages/linux/kdocker.md

@@ -0,0 +1,28 @@
+# kdocker
+
+> Easily dock applications to the system tray.
+> More information: <https://github.com/user-none/KDocker>.
+
+- Display a cursor to send a window to the system tray when pressing the left mouse button (press any other mouse button to cancel):
+
+`kdocker`
+
+- Open an application and send it to the system tray:
+
+`kdocker {{application}}`
+
+- Send focused window to the system tray:
+
+`kdocker -f`
+
+- Display a cursor to send a window to the system tray with a custom icon when pressing the left mouse button:
+
+`kdocker -i {{/path/to/icon}}`
+
+- Open an application, send it to the system tray and if focus is lost, minimize it:
+
+`kdocker -l {{application}}`
+
+- Print version:
+
+`kdocker --version`