feat: add shared PostgreSQL fnOS service and refresh UI

fnos-postgresql/config/privilege

@@ -0,0 +1,5 @@
+{
+  "defaults": {
+    "run-as": "package"
+  }
+}

fnos-postgresql/config/resource

@@ -0,0 +1,18 @@
+{
+  "data-share": {
+    "shares": [
+      {
+        "name": "postgresql",
+        "permission": {
+          "rw": ["nxsir.postgresql"]
+        }
+      },
+      {
+        "name": "postgresql/backups",
+        "permission": {
+          "rw": ["nxsir.postgresql"]
+        }
+      }
+    ]
+  }
+}