feat: 821 start settings menu

[kjy5]

No description provided.

[Copilot]

Pull Request Overview

This PR implements a settings menu for the application by adding a new Settings dialog accessible through the main UI. The changes introduce a tabbed settings interface with an EphysLink configuration panel.

• Adds a new Settings.uxml view with tabbed interface structure
• Integrates the settings dialog into the main UI with a gear icon button
• Updates the main view to include settings template and dialog trigger
• Removes unused code from MainViewModel related to scene state subscription

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

File	Description
Assets/UI/Views/Settings.uxml	Creates new settings view with tabs and EphysLink configuration panel
Assets/UI/Main.uxml	Integrates settings dialog trigger and template into main UI layout
Assets/Scripts/UI/Views/MainView.cs	Removes unused UnityEngine import in favor of conditional compilation
Assets/Scripts/UI/ViewModels/MainViewModel.cs	Cleans up unused scene state subscription references

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}