fix(tests): correct Playwright locator for Script DNS provider field

The E2E test "should show script path field when Script type is selected"
was failing because the locator didn't match the actual UI field.

Update locator from /create/i to /script path/i
Update placeholder matcher from /create-dns/i to /dns-challenge.sh/i
Matches actual ScriptProvider field: label="Script Path",
placeholder="/scripts/dns-challenge.sh"
Also includes skill infrastructure for Playwright (separate feature):

Add test-e2e-playwright.SKILL.md for non-interactive test execution
Add run.sh script with argument parsing and report URL output
Add VS Code tasks for skill execution and report viewing

.vscode/tasks.json

@@ -391,6 +391,31 @@
             "command": "echo '✅ Supply chain audit complete'",
             "group": "test",
             "problemMatcher": []
+        },
+        {
+            "label": "Test: E2E Playwright (Skill)",
+            "type": "shell",
+            "command": ".github/skills/scripts/skill-runner.sh test-e2e-playwright",
+            "group": "test",
+            "problemMatcher": [],
+            "presentation": {
+                "reveal": "always",
+                "panel": "dedicated",
+                "close": false
+            }
+        },
+        {
+            "label": "Test: E2E Playwright - View Report",
+            "type": "shell",
+            "command": "npx playwright show-report --port 9323",
+            "group": "none",
+            "problemMatcher": [],
+            "isBackground": true,
+            "presentation": {
+                "reveal": "always",
+                "panel": "dedicated",
+                "close": false
+            }
         }
     ],
     "inputs": [