Replace PInvokes in PreviewHandler with CsWin32

Author: 0x5bfa

src/Files.App.CsWin32/NativeMethods.json

@@ -1,5 +1,20 @@
 {
 	"$schema": "https://aka.ms/CsWin32.schema.json",
 	"allowMarshaling": false,
-	"public": true
+	"public": true,
+	"comInterop": {
+		"preserveSigMethods": [
+			"IEnumShellItems.Next",
+			"IInitializeWithFile.Initialize",
+			"IInitializeWithItem.Initialize",
+			"IInitializeWithStream.Initialize",
+			"IPreviewHandler.QueryFocus",
+			"IPreviewHandler.SetRect",
+			"IObjectWithSite.SetSite",
+			"IPreviewHandler.SetWindow",
+			"IPreviewHandlerVisuals.SetBackgroundColor",
+			"IPreviewHandlerVisuals.SetFont",
+			"IPreviewHandlerVisuals.SetTextColor",
+		]
+	}
 }

src/Files.App.CsWin32/NativeMethods.txt

@@ -135,3 +135,10 @@ GetModuleHandle
 RegisterClassEx
 CREATESTRUCTW
 AssocQueryString
+IPreviewHandlerFrame
+IPreviewHandlerVisuals
+IObjectWithSite
+IInitializeWithStream
+IInitializeWithStreamNative
+IInitializeWithFile
+IInitializeWithItem