systemd-path: add page (#10622)

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/linux/systemd-path.md

@@ -0,0 +1,20 @@
+# systemd-path
+
+> List and query system and user paths.
+> More information: <https://www.freedesktop.org/software/systemd/man/systemd-path.html>.
+
+- Display a list of known paths and their current values:
+
+`systemd-path`
+
+- Query the specified path and display its value:
+
+`systemd-path "{{path_name}}"`
+
+- Suffix printed paths with `suffix_string`:
+
+`systemd-path --suffix {{suffix_string}}`
+
+- Print a short version string and then exit:
+
+`systemd-path --version`