i3exit: add page (#7401)

pages/linux/i3exit.md

@@ -0,0 +1,32 @@
+# i3exit
+
+> Exit the i3 window manager.
+> More information: <https://gitlab.manjaro.org/packages/community/i3/i3exit>.
+
+- Log out of i3:
+
+`i3exit logout`
+
+- Lock i3:
+
+`i3exit lock`
+
+- Shut down the system:
+
+`i3exit shutdown`
+
+- Suspend the system:
+
+`i3exit suspend`
+
+- Switch to the login screen to log in as a different user:
+
+`i3exit switch_user`
+
+- Hibernate the system:
+
+`i3exit hibernate`
+
+- Reboot the system:
+
+`i3exit reboot`