Add captchasolver plugin

[kent13n]

Add CaptchaSolver Plugin - Multi-Vendor CAPTCHA Solving

Overview

This PR introduces a new CaptchaSolver plugin providing a unified interface for detecting and solving CAPTCHAs across multiple vendors. It consolidates and extends the previous RecaptchaPlugin while maintaining full backward compatibility.

Supported Vendors

• ✅ Google reCAPTCHA (v2, v3, Enterprise)
• ✅ GeeTest (v3, v4)
• ✅ Cloudflare Turnstile
• 🔍 hCaptcha (detection only)

Supported Providers

• CapSolver
• 2Captcha

The plugin is designed with an extensible provider interface, making it straightforward to integrate additional solvers in the future.

Key Features

• Modular vendor handler architecture
• Smart CAPTCHA filtering (viewport, score-based, invisible challenges)
• Automatic detection via JavaScript injection
• Per-vendor configuration options
• Comprehensive test coverage

Usage

    var captchaSolver = new CaptchaSolverPlugin(
      new CapSolver("YOUR_API_KEY")
    );

    extra.Use(captchaSolver);
    var browser = await extra.LaunchAsync(new LaunchOptions { Headless = false });
    var page = await browser.NewPageAsync();

    await page.GoToAsync("https://example.com/captcha");
    var result = await captchaSolver.SolveCaptchaAsync(page);

Notes

• No breaking changes
• This plugin acts as the successor to RecaptchaPlugin, which remains available for backward compatibility.
• All tests passing

Credits

Inspired by https://github.com/berstend/puppeteer-extra/tree/master/packages/puppeteer-extra-plugin-recaptcha.