systemd: add terminal path capabilities to manifest

Needed for the open-in-terminal feature, so other cockpit apps can
determine if their base cockpit version supports opening paths in
terminal.

pkg/systemd/manifest.json

@@ -76,7 +76,8 @@
                 {
                     "matches": ["console", "command", "bash", "shell"]
                 }
-            ]
+            ],
+            "capabilities": ["path"]
         }
     },