chore(rules): add 'use strict' header to no-nested-interactive and no-invalid-interactive (Copilot review)

Match the convention used throughout the plugin's CommonJS rule files. The
header was missing on these two; add it for consistency with sibling rules.

Author: johanrd

.claude/settings.local.json

@@ -0,0 +1,14 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(pnpm vitest *)",
+      "Bash(git push *)",
+      "Bash(git add *)",
+      "Bash(git commit -m 'chore\\(deps\\): bump ember-eslint-parser to ^0.10.0 *)",
+      "Bash(node spike.mjs)",
+      "Bash(node dump-ast.mjs)",
+      "WebFetch",
+      "WebSearch"
+    ]
+  }
+}

lib/rules/template-no-invalid-interactive.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const { isHtmlInteractiveContent } = require('../utils/html-interactive-content');
 const { INTERACTIVE_ROLES } = require('../utils/interactive-roles');
 

lib/rules/template-no-nested-interactive.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const { isHtmlInteractiveContent } = require('../utils/html-interactive-content');
 const { INTERACTIVE_ROLES, COMPOSITE_WIDGET_CHILDREN } = require('../utils/interactive-roles');