Describe the bug

Tree-shaking does not work as expected when using validator.js with modern bundlers (esbuild, webpack, etc). Even when only a single function isEmail is imported, the entire library is included in the bundle. This results in unnecessarily large bundles.

This is caused by the main index.js file, which imports all validator functions and aggregates them into a single default export object. This pattern prevents bundlers from removing unused code, even with "sideEffects": false in package.json.

Examples
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Reproductions
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Additional context
Validator.js version:
Node.js version:
OS platform: [windows, linux, macOS, etc]