systemd-inhibit: add page (#10879)

* systemd-inhibit: add page

---------

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/linux/systemd-inhibit.md

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+# systemd-inhibit
+
+> Prohibit the system from entering certain power states.
+> Inhibitor locks may be used to block or delay system sleep and shutdown requests as well as automatic idle handling.
+> More information: <https://www.freedesktop.org/software/systemd/man/systemd-inhibit.html>.
+
+- List all active inhibition locks and the reasons for their creation:
+
+`systemd-inhibit --list`
+
+- Block system shutdown for a specified number of seconds with the `sleep` command:
+
+`systemd-inhibit --what shutdown sleep {{5}}`
+
+- Keep the system from sleeping or idling until the download is complete:
+
+`systemd-inhibit --what sleep:idle wget {{https://example.com/file}}`
+
+- Ignore lid close switch until the script exits:
+
+`systemd-inhibit --what sleep:handle-lid-switch {{path/to/script}}`
+
+- Ignore power button press while command is running:
+
+`systemd-inhibit --what handle-power-key {{command}}`
+
+- Describe who and why created the inhibitor (default: the command and its arguments for `--who` and `Unknown reason` for `--why`):
+
+`systemd-inhibit --who {{$USER}} --why {{reason}} --what {{operation}} {{command}}`