laptop-detect: add page (#7919)

pages/linux/laptop-detect.md

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+# laptop-detect
+
+> Attempt to determine if the script is running on a laptop or desktop.
+> More information: <https://gitlab.com/debiants/laptop-detect>.
+
+- Return an exit status of 0 if the current device is likely a laptop, else returns 1:
+
+`laptop-detect`
+
+- Print the type of device that the current system is detected as:
+
+`laptop-detect --verbose`
+
+- Display the version:
+
+`laptop-detect --version`