refactor: update imports to use ES module syntax and improve test structure (#1350)

- Changed import statements across multiple files to use the .js extension for ES module compatibility.
- Refactored test files to utilize jest's unstable_mockModule for mocking core actions.
- Removed unnecessary spy instances in tests, replacing them with direct mocked function calls.
- Updated TypeScript configuration to target ES2022 and use NodeNext module resolution.
- Removed the tsconfig.spec.json file and adjusted the main tsconfig.json to exclude test files.

.licenses/npm/xml-naming.dep.yml

@@ -0,0 +1,12 @@
+---
+name: xml-naming
+version: 0.1.0
+type: npm
+summary: Validates XML name productions — Name, NCName, QName, NMToken, NMTokens —
+  for XML 1.0 and 1.1
+homepage:
+license: mit
+licenses:
+- sources: README.md
+  text: MIT
+notices: []