kscreen-console, kscreen-doctor: add page (#6078)

pages/linux/kscreen-console.md

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+# kscreen-console
+
+> Command-line tool to query KScreen's status.
+> More information: <https://manned.org/kscreen-console>.
+
+- Show all outputs and configuration files to attach to a bug report:
+
+`kscreen-console bug`
+
+- Show paths to KScreen configuration files:
+
+`kscreen-console config`
+
+- Show KScreen output information and configuration:
+
+`kscreen-console outputs`
+
+- Monitor for changes:
+
+`kscreen-console monitor`
+
+- Show the current KScreen configuration as JSON:
+
+`kscreen-console json`
+
+- Display help:
+
+`kscreen-console --help`
+
+- Display help including Qt specific command-line options:
+
+`kscreen-console --help-all`

pages/linux/kscreen-doctor.md

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+# kscreen-doctor
+
+> Change and manipulate the screen setup from the command-line.
+> More information: <https://invent.kde.org/plasma/libkscreen>.
+
+- Show display output information:
+
+`kscreen-doctor --outputs`
+
+- Set the rotation of a display output with an ID of 1 to the right:
+
+`kscreen-doctor {{output.1.rotation.right}}`
+
+- Set the scale of a display output with an ID of `HDMI-2` to 2 (200%):
+
+`kscreen-doctor {{output.HDMI-2.scale.2}}`