Code separation in the settings window

[onesounds]

What's the PR

• Split the long code/xaml in the settings window.
  • Let each code be managed separately per menu.
• Change TabControl to NavigationView
• Reduced UI-related code with Custom Control

Todo

• Split Pages
• Split Code
• Add DirectX-specific settings
  • Settings window DIRECTX is currently turned off due to startup freezing issues.
  • Since it affects the settings window animation, we also need a setting to turn the animation on and off based on this setting.
    • Will be working on separate PR.

WIP

• About pane
  • Tested
• General pane
  • Tested
• Hotkeys pane
  • Tested
• Plugins pane
  • Tested
• Plugin store pane
  • Tested
• Proxy pane
  • Tested
• Theme pane
  • Tested
• Figure out what to do with SettingWindowViewModel
• Clean up code-behind of the SettingWindow.xaml.cs
  • Tested

Test Cases

• Each page controls(Button, ListBox, ETC...) should work properly.

[github-actions]

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