Add mod dependency ordering and management features

[OwendB1]

This pull request adds comprehensive Steam Workshop mod dependency management to Quasar config profiles and significantly improves the Mods tab UI and workflow. Dependency checks now automatically add missing mods, flag dependencies, and provide explicit topological sorting with user feedback on issues like cycles or out-of-order dependencies. The Mods tab has been redesigned for better load order editing, visualizes dependency outlines, and ensures Space Engineers mod load order is preserved.

Steam Workshop Mod Dependency Management:

• Automatic dependency checks are performed when opening, saving, or importing mods to a config profile. Missing dependency mods are added, and dependencies are flagged with IsDependency in the profile JSON, but the order is not changed automatically. [1] [2] [3]
• The Mods tab introduces an Auto Sort Dependencies action that applies a topological sort to ensure dependencies are loaded before dependents, while keeping unrelated mod order stable. Warnings are shown for cycles or out-of-order dependencies. [1] [2] [3] [4]

Mods Tab UI/UX Improvements:

• The Mods tab now displays a collapsed, flattened dependency outline after checks or sorting, with rows tagged as root mods, dependencies, repeats, or cycles for operator inspection. [1] [2] [3] [4]
• The mod list UI is redesigned to a drag-and-drop table that reflects true mod load order. Operators can reorder mods directly, and dependency status is visually indicated. [1] [2] [3]

Profile and World Import Integration:

• Dependency checks are integrated into profile save and world-template import flows, ensuring all profiles are dependency-complete and flagged before use. [1] [2] [3]

Internal State and Code Refactoring:

• Several new UI state fields and helper methods are added to support dependency tree rendering, drag-and-drop, and efficient UI updates. [1] [2]

These changes ensure that Quasar-managed servers always have a valid, dependency-complete mod configuration, with clear operator control and visibility into mod relationships and load order.