lid: add page (#7578)

pages/linux/libuser-lid.md

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+# libuser-lid
+
+> Display a user's groups or a group's users.
+> On Fedora and Arch Linux, this program is installed as `lid`.
+> More information: <https://manned.org/lid.8>.
+
+- List primary and secondary groups of a specific user:
+
+`sudo lid {{username}}`
+
+- List users of a specific group:
+
+`sudo lid --group {{name}}`

pages/linux/lid.md

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+# lid
+
+> NOTE: This page is currently a redirection stub. If you are familiar with this program, please open a pull request.
+> Query ID database and report results.
+> On Fedora and Arch Linux, the binary name `lid` is taken by another program. See `tldr libuser-lid`.
+> More information: <https://www.gnu.org/software/idutils/>.
+
+- View documentation for `libuser-lid`:
+
+`tldr libuser-lid`