feat: support default extensionAlias

[Timeless0911]

Summary

closes: #41

We add builtin resolve.extensionAlias to align with the TypeScript specific behavior: if the extension is ".js" or ".jsx", try replacing it with ".ts" or ".tsx"

resolve: {
  extensionAlias: {
    '.js': ['.ts', '.tsx', '.js', '.jsx'],
    '.jsx': ['.tsx', '.jsx'],
    '.mjs': ['.mts', '.mjs'],
    '.cjs': ['.cts', '.cjs'],
  },
},

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Checklist

• Tests updated (or not required).
• Documentation updated (or not required).