docs: add IPC doc (#32059)

* docs: add IPC doc

* fix: use "string" primitive

* use 'string' ipcrenderer

* use "number" primitive

* Update docs/tutorial/ipc.md

Co-authored-by: Jeremy Rose <nornagon@nornagon.net>

* Update docs/tutorial/ipc.md

Co-authored-by: Jeremy Rose <nornagon@nornagon.net>

* add code sample

Co-authored-by: Jeremy Rose <nornagon@nornagon.net>

docs/fiddles/ipc/pattern-3/main.js

@@ -0,0 +1,48 @@
+const {app, BrowserWindow, Menu} = require('electron')
+const path = require('path')
+
+function createWindow () {
+  const mainWindow = new BrowserWindow({
+    webPreferences: {
+      preload: path.join(__dirname, 'preload.js')
+    }
+  })
+
+  const menu = Menu.buildFromTemplate([
+    {
+      label: app.name,
+      submenu: [
+      {
+        click: () => mainWindow.webContents.send('update-counter', 1),
+        label: 'Increment',
+      },
+      {
+        click: () => mainWindow.webContents.send('update-counter', -1),
+        label: 'Decrement',
+      }
+      ]
+    }
+
+  ])
+
+  Menu.setApplicationMenu(menu)
+  mainWindow.loadFile('index.html')
+
+  // Open the DevTools.
+  mainWindow.webContents.openDevTools()
+}
+
+app.whenReady().then(() => {
+  ipcMain.on('counter-value', (_event, value) => {
+    console.log(value) // will print value to Node console
+  })
+  createWindow()
+  
+  app.on('activate', function () {
+    if (BrowserWindow.getAllWindows().length === 0) createWindow()
+  })
+})
+
+app.on('window-all-closed', function () {
+  if (process.platform !== 'darwin') app.quit()
+})