chore: refactor browser IPC into TS and app API into TS (#16921)

* chore: refactor browser IPC into typescript

* chore: refactor app.ts into Typescript

* Refactors app.dock into cpp
* Removes app.launcher which has not existed for 3 years
* Removes 2 deprecated APIs (that have been deprecated for more than one
major)
* Refactors deprecate.ts as well

typings/internal-ambient.d.ts

@@ -22,6 +22,8 @@ declare namespace NodeJS {
     atomBinding(name: string): any;
     atomBinding(name: 'features'): FeaturesBinding;
     atomBinding(name: 'v8_util'): V8UtilBinding;
+    atomBinding(name: 'app'): { app: Electron.App, App: Function };
+    atomBinding(name: 'command_line'): Electron.CommandLine;
     log: NodeJS.WriteStream['write'];
     activateUvLoop(): void;
   }