latte-dock: add page (#8819)

pages/linux/latte-dock.md

@@ -0,0 +1,20 @@
+# latte-dock
+
+> Replacement dock for Plasma desktop.
+> More information: <https://github.com/KDE/latte-dock>.
+
+- Clear QML cache:
+
+`latte-dock --clear-cache`
+
+- Import and load default layout on startup:
+
+`latte-dock --default-layout`
+
+- Load a specific layout on startup:
+
+`latte-dock --layout {{layout_name}}`
+
+- Import and load a specific layout:
+
+`latte-dock --import-layout {{path/to/file}}`