Make convert remaining js config files to ts

Co-authored-by: hughns
Signed-off-by: Timo K <toger5@hotmail.de>

vite-embedded.config.ts

@@ -0,0 +1,39 @@
+/*
+Copyright 2025 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { defineConfig, mergeConfig } from "vite";
+import generateFile from "vite-plugin-generate-file";
+
+import fullConfig from "./vite.config";
+
+const base = "./";
+
+// Config for embedded deployments (possibly hosted under a non-root path)
+export default defineConfig((env) =>
+  mergeConfig(
+    fullConfig({ ...env, packageType: "embedded" }),
+    defineConfig({
+      base, // Use relative URLs to allow the app to be hosted under any path
+      publicDir: false, // Don't serve the public directory which only contains the favicon
+      plugins: [
+        generateFile([
+          {
+            type: "json",
+            output: "./config.json",
+            data: {
+              matrix_rtc_session: {
+                wait_for_key_rotation_ms: 5000,
+                delayed_leave_event_restart_ms: 4000,
+                delayed_leave_event_delay_ms: 18000,
+              },
+            },
+          },
+        ]),
+      ],
+    }),
+  ),
+);