Rewrite the options menu (#28389)

* Basic attempt at rewriting how the options menu works, move accessibility settings into their own tab.

* Audio tab uses the new options system.

* Rewrite Misc tab

* Clean up heading styling

* Rewrite options tab and other minor cleanup all over the place.

* Documentation comments and minor cleanup.

---------

Co-authored-by: AJCM <AJCM@tutanota.com>
Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Client/Options/UI/OptionDropDown.xaml.cs

@@ -0,0 +1,21 @@
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface;
+
+namespace Content.Client.Options.UI;
+
+/// <summary>
+/// Standard UI control used for drop-downs in the options menu. Intended for use with <see cref="OptionsTabControlRow"/>.
+/// </summary>
+/// <seealso cref="OptionsTabControlRow.AddOptionDropDown{T}"/>
+[GenerateTypedNameReferences]
+public sealed partial class OptionDropDown : Control
+{
+    /// <summary>
+    /// The text describing what this drop-down controls.
+    /// </summary>
+    public string? Title
+    {
+        get => NameLabel.Text;
+        set => NameLabel.Text = value;
+    }
+}