Implement auto-update functionality and settings integration

[DinanathDash]

This pull request introduces a comprehensive update system for Stasis, allowing the app to check for, notify about, and automatically download updates from GitHub. It adds a new UpdaterService, integrates update preferences into the settings UI, and expands localization strings to support these features. Additionally, it improves the menu rebuilding logic for better user experience.

Update System Integration:

• Added the UpdaterService singleton, which checks for updates from GitHub, notifies the user, and can auto-download updates to the Downloads folder based on user preferences. It supports both manual and automatic update checks and handles user interaction for update installation. (Stasis/Services/UpdaterService.swift)
• Introduced new user defaults keys for update automation and preferences, enabling persistent control over update behavior. (Stasis/DefaultsKeys.swift)
• Added the AboutSettingsView to the settings UI, providing controls for update preferences, manual update checks, and displaying version information. (Stasis/Views/Settings/AboutSettingsView.swift)
• Updated SettingsWindowController and SettingsView to include and pass the UpdaterService and new About tab. (Stasis/Controllers/SettingsWindowController.swift, Stasis/Views/Settings/SettingsView.swift) [1] [2] [3]

Localization and UI:

• Added multiple new localized strings for the update system, About section, and related UI elements. (Stasis/L10n/Localizable.xcstrings) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]

Menu Handling Improvements:

• Improved menu rebuilding logic to defer menu updates while the menu is open, preventing UI inconsistencies, and ensuring the menu is rebuilt when closed if needed. (Stasis/AppDelegate.swift) [1] [2] [3] [4] [5] [6]

These changes collectively provide a robust, user-friendly update experience and enhance the overall settings and UI responsiveness.

[DinanathDash]

@srimanachanta You need to edit out some logic according to your GitHub configurations. In the next PR, I'm adding the GitHub automation for both brew and .dmg app installation methods, to support this auto updater function.

[srimanachanta]

Given this cask isnt marked as auto-updating on homebrew, and likely will not be, you should be guarding on homebrew installs to disable this feature entirely.

[DinanathDash]

Hey @srimanachanta! Addressed your review — here's what was updated:

UpdaterService.swift

• Added a static isHomebrewInstall property that detects Homebrew Cask installs by checking if the app's bundle path lives under a known Caskroom prefix (/opt/homebrew/Caskroom on Apple Silicon, /usr/local/Caskroom on Intel).
• Guarded both startIfAvailable() and checkForUpdates() to silently no-op when running from a Homebrew install — so the auto-updater is fully disabled in that case.

AboutSettingsView.swift

• When running from Homebrew, the update toggle/picker/button is replaced with an informational note explaining that updates are managed by Homebrew, along with the command to run: brew upgrade --cask stasis.
• Non-Homebrew installs (direct .dmg downloads) continue to show the full update preferences UI as before.

Let me know if anything needs tweaking!