Move more .d.ts files to .ts (#5060)

* Move more .d.ts files to .ts

* Add release notes

* Some errors with templates snuck in

* Fix API build

* CodeRabbit feedback

* Move budget templates to new directory

* Fix type errors in library module

packages/loot-core/typings/window.ts

@@ -0,0 +1,56 @@
+// @ts-strict-ignore
+export {};
+
+type FileDialogOptions = {
+  properties?: Array<'openFile' | 'openDirectory'>;
+  filters?: {
+    name: string;
+    extensions: string[];
+  }[];
+};
+
+type Actual = {
+  IS_DEV: boolean;
+  ACTUAL_VERSION: string;
+  openURLInBrowser: (url: string) => void;
+  saveFile: (
+    contents: string | Buffer,
+    filename: string,
+    dialogTitle?: string,
+  ) => Promise<void>;
+  openFileDialog: (options: FileDialogOptions) => Promise<string[]>;
+  relaunch: () => void;
+  reload: (() => Promise<void>) | undefined;
+  restartElectronServer: () => void;
+  moveBudgetDirectory: (
+    currentBudgetDirectory: string,
+    newDirectory: string,
+  ) => Promise<void>;
+  applyAppUpdate: () => Promise<void>;
+  updateAppMenu: (budgetId: string) => void;
+  ipcConnect: (callback: (client) => void) => void;
+  getServerSocket: () => Promise<Worker | null>;
+  setTheme: (theme: string) => void;
+  logToTerminal: (...args: unknown[]) => void;
+  onEventFromMain: (
+    event: string,
+    listener: (...args: unknown[]) => void,
+  ) => void;
+  isUpdateReadyForDownload: () => boolean;
+  waitForUpdateReadyForDownload: () => Promise<void>;
+  startSyncServer: () => Promise<void>;
+  stopSyncServer: () => Promise<void>;
+  isSyncServerRunning: () => Promise<boolean>;
+  startOAuthServer: () => Promise<string>;
+};
+
+declare global {
+  interface Window {
+    __navigate?: import('react-router').NavigateFunction;
+  }
+
+  // eslint-disable-next-line no-var
+  var Actual: Actual;
+  // eslint-disable-next-line no-var
+  var IS_TESTING: boolean;
+}