MineralUI Basic 1.2.0 - Responsive Navigation and Simpler Cookie Consent Setup

• Added built-in responsive mobile navigation to MNavbar, including the automatic hamburger toggle and shared desktop/mobile menu flow
• Improved MNavs item support with icon, iconOnly and iconSize, making icon-first navigation patterns easier to build
• Simplified header implementation so projects no longer need separate isDesktop checks or duplicated mobile navigation markup
• Reworked MCookieConsent integration around a backend-hosted bootstrap.min.js script instead of a project-local bootstrap module
• Kept consent restore, declaration loading, category-based blocking and consent persistence aligned with backend siteKey endpoints
• Simplified production setup to one external cookie bootstrap script in <head> and one <MCookieConsent /> in the application tree