cec-ctl: add page (#17852)

Co-authored-by: Harshavardhan <harshath3018@gmail.com>

pages/linux/cec-ctl.md

@@ -0,0 +1,17 @@
+# cec-ctl
+
+> Control kernel CEC devices.
+> See also: `cec-client`.
+> More information: <https://manned.org/cec-ctl>.
+
+- List CEC devices:
+
+`cec-ctl --list-devices`
+
+- Monitor CEC traffic:
+
+`sudo cec-ctl {{[-m|--monitor]}}`
+
+- Show CEC topology:
+
+`cec-ctl {{[-S|--show-topology]}}`