Add IInternal/PublicDisposableService (#1696)

* Add IInternal/PublicDisposableService

Plugins are exposed interfaces that are not inherited from
`IDisposable`, but services implementing plugin interfaces often
implement `IDisposable`. Some plugins may try to call
`IDisposable.Dispose` on everything provided, and it also is possible to
use `using` clause too eagerly while working on Dalamud itself, such as
writing `using var smth = await Service<SomeService>.GetAsync();`. Such
behaviors often lead to a difficult-to-debug errors, and making those
services either not an `IDisposable` or making `IDisposable.Dispose` do
nothing if the object has been loaded would prevent such errors. As
`ServiceManager` must be the only class dealing with construction and
disposal of services, `IInternalDisposableService` has been added to
limit who can dispose the object. `IPublicDisposableService` also has
been added to classes that can be constructed and accessed directly by
plugins; for those, `Dispose` will be ignored if the instance is a
service instance, and only `DisposeService` will respond.

In addition, `DalamudPluginInterface` and `UiBuilder` also have been
changed so that their `IDisposable.Dispose` no longer respond, and
instead, internal functions have been added to only allow disposal from
Dalamud.

* Cleanup

* Postmerge fixes

* More explanation on RunOnFrameworkThread(ClearHooks)

* Mark ReliableFileStorage public ctor obsolete

---------

Co-authored-by: goat <16760685+goaaats@users.noreply.github.com>

Dalamud/Game/TargetSigScanner.cs

@@ -15,7 +15,7 @@ namespace Dalamud.Game;
 #pragma warning disable SA1015
 [ResolveVia<ISigScanner>]
 #pragma warning restore SA1015
-internal class TargetSigScanner : SigScanner, IServiceType
+internal class TargetSigScanner : SigScanner, IPublicDisposableService
 {
     /// <summary>
     /// Initializes a new instance of the <see cref="TargetSigScanner"/> class.
@@ -26,4 +26,14 @@ internal class TargetSigScanner : SigScanner, IServiceType
         : base(Process.GetCurrentProcess().MainModule!, doCopy, cacheFile)
     {
     }
+
+    /// <inheritdoc/>
+    void IInternalDisposableService.DisposeService()
+    {
+        if (this.IsService)
+            this.DisposeCore();
+    }
+
+    /// <inheritdoc/>
+    void IPublicDisposableService.MarkDisposeOnlyFromService() => this.IsService = true;
 }