extract types for ipc

desktop/src/sidebar/preload.ts

@@ -1,10 +1,13 @@
 import { contextBridge, ipcRenderer } from "electron";
+import type { WorkAdventureSidebarApi } from "./types";
 
-contextBridge.exposeInMainWorld("WorkAdventureDesktopApi", {
+const api: WorkAdventureSidebarApi = {
   desktop: true,
   getServers: () => ipcRenderer.invoke("sidebar:getServers"),
   selectServer: (serverId: string) =>
     ipcRenderer.invoke("sidebar:selectServer", serverId),
   addServer: (serverName: string, serverUrl: string) =>
     ipcRenderer.invoke("sidebar:addServer", serverName, serverUrl),
-});
+};
+
+contextBridge.exposeInMainWorld("WorkAdventureDesktopApi", api);