feat: Add sorting functionality to installed scripts table

[michelroegl-brunner]

Summary

This PR adds comprehensive sorting functionality to the installed scripts table in the InstalledScriptsTab component.

Changes Made

• ✅ Added sortable columns for Script Name, Container ID, Server, Status, and Installation Date
• ✅ Implemented clickable table headers with visual sort indicators (↑/↓)
• ✅ Added ascending/descending toggle functionality
• ✅ Maintained existing search and filter functionality
• ✅ Set default sort by Script Name (ascending)
• ✅ Added proper handling of null values in sorting logic

Features

• Interactive Headers: Click any column header to sort by that column
• Visual Feedback: Sort indicators show current sort field and direction
• Smart Sorting: Case-insensitive text sorting, proper date sorting, null value handling
• Seamless Integration: Works with existing search and filter functionality

Testing

• All columns sort correctly in both ascending and descending order
• Sorting works with filtered results
• Null values are handled gracefully
• UI provides clear visual feedback

Screenshots

The table headers now show sort indicators and are clickable for easy sorting by any column.