wpexec: add page (#11900)

pages/common/wpexec.md

@@ -0,0 +1,13 @@
+# wpexec
+
+> Run WirePumbler Lua scripts.
+> See also: `wpctl`, `wirepumbler`.
+> More information: <https://pipewire.pages.freedesktop.org/wireplumber/lua_api/lua_introduction.html>.
+
+- Run a WirePumbler script:
+
+`wpexec {{path/to/file.lua}}`
+
+- Display help:
+
+`wpexec --help`