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

docs/api/structures/event.md

@@ -1,9 +1,3 @@
 # Event Object extends `GlobalEvent`
 
 * `preventDefault` VoidFunction
-* `sender` WebContents
-* `returnValue` any
-* `ctrlKey` Boolean (optional) - whether the Control key was used in an accelerator to trigger the Event
-* `metaKey` Boolean (optional) - whether a meta key was used in an accelerator to trigger the Event
-* `shiftKey` Boolean (optional) - whether a Shift key was used in an accelerator to trigger the Event
-* `altKey` Boolean (optional) - whether an Alt key was used in an accelerator to trigger the Event

docs/api/structures/ipc-main-event.md

@@ -0,0 +1,8 @@
+# IpcMainEvent Object extends `Event`
+
+* `frameId` Integer - The ID of the renderer frame that sent this message
+* `returnValue` any - Set this to the value to be returned in a syncronous message
+* `sender` WebContents - Returns the `webContents` that sent the message
+* `reply` Function - A function that will send an IPC message to the renderer frane that sent the original message that you are currently handling.  You should use this method to "reply" to the sent message in order to guaruntee the reply will go to the correct process and frame.
+  * `...args` any[]
+IpcRenderer

docs/api/structures/ipc-renderer-event.md

@@ -0,0 +1,6 @@
+# IpcRendererEvent Object extends `Event`
+
+* `sender` IpcRenderer - The `IpcRenderer` instance that emitted the event originally
+* `senderId` Integer - The `webContents.id` that sent the message, you can call `event.sender.sendTo(event.senderId, ...)` to reply to the message, see [ipcRenderer.sendTo][ipc-renderer-sendto] for more information. This only applies to messages sent from a different renderer. Messages sent directly from the main process set `event.senderId` to `0`.
+
+[ipc-renderer-sendto]: #ipcrenderersendtowindowid-channel--arg1-arg2-

docs/api/structures/keyboard-event.md

@@ -0,0 +1,6 @@
+# KeyboardEvent Object extends `Event`
+
+* `ctrlKey` Boolean (optional) - whether the Control key was used in an accelerator to trigger the Event
+* `metaKey` Boolean (optional) - whether a meta key was used in an accelerator to trigger the Event
+* `shiftKey` Boolean (optional) - whether a Shift key was used in an accelerator to trigger the Event
+* `altKey` Boolean (optional) - whether an Alt key was used in an accelerator to trigger the Event