feat: register all 5 rules (S001, S003, S004, S005, S006)

Updates rules/index.ts to export the complete v0.0.1 rule set.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hermanngeorge15

src/rules/index.ts

@@ -1,8 +1,14 @@
 import { Rule } from '../types.js';
 import { requiredSectionsRule } from './S001-required-sections.js';
 import { noSecretsRule } from './S003-no-secrets.js';
+import { fileSizeRule } from './S004-file-size.js';
+import { noWildcardPermissionsRule } from './S005-no-wildcard-permissions.js';
+import { noDuplicateHeadersRule } from './S006-no-duplicate-headers.js';
 
 export const allRules: Rule[] = [
   requiredSectionsRule,
   noSecretsRule,
+  fileSizeRule,
+  noWildcardPermissionsRule,
+  noDuplicateHeadersRule,
 ];