Add AMD/RequireJS support with UMD wrapper

[Copilot]

Adds AMD module loading support via separate build outputs using a UMD wrapper.

Changes

• New build task: build-amd in gulpfile.mjs generates jsvalidation.amd.js and minified variant
• UMD wrapper: Supports AMD, CommonJS, and browser globals with jQuery dependency declaration
• Module export: laravelValidation accessible via $.laravelValidation in addition to global scope
• Build integration: npm run build now generates both standard and AMD outputs

Usage

requirejs.config({
    paths: {
        'jquery': 'path/to/jquery',
        'jsvalidation': 'vendor/jsvalidation/js/jsvalidation.amd'
    }
});

requirejs(['jsvalidation'], function($) {
    // Use $.laravelValidation or window.laravelValidation
    {!! JsValidator::formRequest('App\Http\Requests\MyFormRequest') !!}
});

Size overhead: 0.58 KB (0.20%). Original build unchanged for backward compatibility.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Can you provide support for AMD ?</issue_title>
<issue_description></issue_description>

<agent_instructions>Add support for loading via AMD (requireJS). Integrate the solution into the existing build configuration (webpack).</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@bytestream AMD? @bytestream You're welcome to send a PR which updates https://github.com/proengsoft/laravel-jsvalidation/blob/master/gulpfile.mjs to provide a separate build file for AMD.

• Fixes Can you provide support for AMD ? #1077

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