Revision of the EasyBlog component

• Installer and component work on Joomla 5.3.x, 5.4.x and 6.0
• Theme uikit and complete theme wireframe refactored
• Replaced old Joomla legacy calls
• Modules adapted, tested and working
• Plugins refactored and working
• Foundry-library and -plugin: codebase reviewed/corrected, both working
• Mediamanager refactored an tested on J5.4 and 6.0
• Frontend views and -features corrected and functional
• Component can easily be installed over older versions
• Quickpost feature corrected, Composer, Dashboard etc. fully functional
• Various DB-queries adapted/rewritten
• Refined inst.-routine now installs all plugins successfully in Joomla 6.0