kdenlive: add page (#9545)

pages/common/kdenlive.md

@@ -0,0 +1,28 @@
+# kdenlive
+
+> KDE's non-linear video editor.
+> More information: <https://manned.org/kdenlive>.
+
+- Start the video editor:
+
+`kdenlive`
+
+- Open a specific file:
+
+`kdenlive {{path/to/file}}.kdenlive`
+
+- Set a specific path for an MLT environment:
+
+`kdenlive --mlt-path {{path/to/directory}}`
+
+- Set a specific log level for an MLT environment:
+
+`kdenlive --mlt-log {{verbose|debug}}`
+
+- Display help:
+
+`kdenlive --help`
+
+- Display version:
+
+`kdenlive --version`