feat: salvage windows desktop e2e skill

Reintroduce the Windows desktop E2E testing skill from stale PR #1334 with current manifest wiring, package publish coverage, catalog counts, and sanitized environment-path guidance.

manifests/install-components.json

@@ -395,6 +395,14 @@
         "workflow-quality"
       ]
     },
+    {
+      "id": "skill:windows-desktop-e2e",
+      "family": "skill",
+      "description": "E2E testing for Windows native desktop apps with pywinauto and Windows UI Automation.",
+      "modules": [
+        "workflow-quality"
+      ]
+    },
     {
       "id": "skill:strategic-compact",
       "family": "skill",

manifests/install-modules.json

@@ -232,7 +232,8 @@
         "skills/skill-stocktake",
         "skills/strategic-compact",
         "skills/tdd-workflow",
-        "skills/verification-loop"
+        "skills/verification-loop",
+        "skills/windows-desktop-e2e"
       ],
       "targets": [
         "claude",