pkcon: add page (#9494)

pages/linux/pkcon.md

@@ -0,0 +1,28 @@
+# pkcon
+
+> Command line client for PackageKit console program used by Discover and Gnome software and alternative to 'apt'.
+> More information: <https://manned.org/pkcon>.
+
+- Install a package:
+
+`pkcon install {{package}}`
+
+- Remove a package:
+
+`pkcon remove {{package}}`
+
+- Refresh the package cache:
+
+`pkcon refresh`
+
+- Update packages:
+
+`pkcon update`
+
+- Search for a specific package:
+
+`pkcon search {{package}}`
+
+- List all available packages:
+
+`pkcon get-packages`