feat: Add Vue.js page object generation support

[killerdevildog]

• Implement VuePageObjectGenerator class with HTML parsing using HtmlAgilityPack
• Add WebPageObject.template for generating C# page object classes
• Support id, data-testid, v-test-id, and class attribute locators
• Map HTML elements to appropriate Legerity web element types
• Update Program.cs to enable Web platform with Vue generator
• Add HtmlAgilityPack dependency to project file

Resolves #200

Resolves

PR checklist

• [ x] Have Legerity sample tests been added or updated, run locally, and all pass
• [x ] Have added or updated support for platform specific element wrappers been reflected in the Page Object Generator
• [ ] Have code styling rules been run on all new source file changes
• [ ] Have relevant articles in the docs been added or updated for all new source file changes
• [ ] Have major breaking changes been made and are documented

Other information