mqtt_check.py, impacket-mqtt_check: add page (#16262)

* mqtt_check.py, impacket-mqtt_check: add page

* Move to common.

pages/common/impacket-mqtt_check.md

@@ -0,0 +1,7 @@
+# impacket-mqtt_check
+
+> This command is an alias of `mqtt_check.py`.
+
+- View documentation for the original command:
+
+`tldr mqtt_check.py`

pages/common/mqtt_check.py.md

@@ -0,0 +1,29 @@
+# mqtt_check.py
+
+> Simple utility for testing and validating MQTT login credentials.
+> Part of the Impacket suite.
+> More information: <https://github.com/fortra/impacket>.
+
+- Check MQTT login credentials for a target (MQTT broker's hostname):
+
+`mqtt_check.py {{domain}}/{{username}}:{{password}}@{{targetName}}`
+
+- Specify a custom client ID for authentication:
+
+`mqtt_check.py -client-id {{client_id}} {{domain}}/{{username}}:{{password}}@{{targetName}}`
+
+- Enable SSL for the connection:
+
+`mqtt_check.py -ssl {{domain}}/{{username}}:{{password}}@{{targetName}}`
+
+- Connect to a specific port (default is 1883):
+
+`mqtt_check.py -port {{port}} {{domain}}/{{username}}:{{password}}@{{targetName}}`
+
+- Enable debug output:
+
+`mqtt_check.py -debug {{domain}}/{{username}}:{{password}}@{{targetName}}`
+
+- Display help message:
+
+`mqtt_check.py --help`