refactor: Split 'Event' docs/types into more specific Event types (#17038)

* Event = Base event type (with preventDefault)
* IpcMainEvent = Event that ipcMain emits (with sender, reply, etc.)
* IpcRendererEvent = Event that ipcRenderer emits (with sender,
senderId, etc.)
* KeyboardEvent = Event that we emit with keyboard flags (ctrlKey,
altKey, etc.)

This will dramatically improve peoples TS experience with IPC events

lib/renderer/ipc-renderer-internal-utils.ts

@@ -7,7 +7,7 @@ export function invoke<T> (command: string, ...args: any[]) {
   return new Promise<T>((resolve, reject) => {
     const requestId = ++nextId
     ipcRendererInternal.once(`${command}_RESPONSE_${requestId}`, (
-      _event: Electron.Event, error: Electron.SerializedError, result: any
+      _event, error: Electron.SerializedError, result: any
     ) => {
       if (error) {
         reject(errorUtils.deserialize(error))