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

lib/browser/ipc-main-internal-utils.ts

@@ -0,0 +1,29 @@
+import { ipcMainInternal } from '@electron/internal/browser/ipc-main-internal'
+import * as errorUtils from '@electron/internal/common/error-utils'
+
+type IPCHandler = (...args: any[]) => any
+
+const callHandler = async function (handler: IPCHandler, event: Electron.Event, args: any[], reply: (args: any[]) => void) {
+  try {
+    const result = await handler(event, ...args)
+    reply([null, result])
+  } catch (error) {
+    reply([errorUtils.serialize(error)])
+  }
+}
+
+export const handle = function <T extends IPCHandler> (channel: string, handler: T) {
+  ipcMainInternal.on(channel, (event, requestId, ...args) => {
+    callHandler(handler, event, args, responseArgs => {
+      event._replyInternal(`${channel}_RESPONSE_${requestId}`, ...responseArgs)
+    })
+  })
+}
+
+export const handleSync = function <T extends IPCHandler> (channel: string, handler: T) {
+  ipcMainInternal.on(channel, (event, ...args) => {
+    callHandler(handler, event, args, responseArgs => {
+      event.returnValue = responseArgs
+    })
+  })
+}