feat: use inset title bar style on macOS (#47)

Co-authored-by: V <vendicated@riseup.net>

src/renderer/patches/platformClass.tsx

@@ -0,0 +1,22 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0
+ * Vesktop, a desktop app aiming to give you a snappier Discord Experience
+ * Copyright (c) 2023 Vendicated and Vencord contributors
+ */
+
+import { addPatch } from "./shared";
+
+addPatch({
+    patches: [
+        {
+            find: "platform-web",
+            replacement: {
+                // eslint-disable-next-line no-useless-escape
+                match: /(?<=" platform-overlay"\):)\i/,
+                replace: "$self.getPlatformClass()"
+            }
+        }
+    ],
+
+    getPlatformClass: () => (navigator.platform.toLowerCase().startsWith("mac") ? "platform-osx" : "platform-web")
+});