feat(ui): add measured linear progress to resource rows

registry/components.json

@@ -1,6 +1,28 @@
 {
   "schemaVersion": "1.0.0",
   "components": [
+{
+  "id": "progress-bar",
+  "status": "baseline",
+  "package": "@nodedc/ui-react",
+  "exports": [
+    "ProgressBar",
+    "ProgressBarProps"
+  ],
+  "domContract": [
+    "nodedc-progress-bar"
+  ],
+  "summary": "Accessible determinate or indeterminate linear progress, including the central ResourceRow slot.",
+  "variants": [
+    "determinate",
+    "indeterminate"
+  ],
+  "rules": [
+    "Consumer supplies measured progress; elapsed time must not invent completion.",
+    "ResourceRow progress replaces status and occupies space between copy and actions.",
+    "Reduced motion preserves a visible non-animated indicator."
+  ]
+},
     {
       "id": "resource-row",
       "status": "baseline",