feat: WebContents.getOrCreateDevToolsTargetId() (#49733)

* Feat: support getDevToolsId() on WebContents

* Rename to `getOrCreateDevToolsTargetId`

* build: use spawn instead of spawnSync for build (#49774)

* Fix build

* formatting

---------

Co-authored-by: John Kleinschmidt <jkleinsc@electronjs.org>

docs/api/web-contents.md

@@ -2235,6 +2235,16 @@ Returns `string` - The identifier of a WebContents stream. This identifier can b
 with `navigator.mediaDevices.getUserMedia` using a `chromeMediaSource` of `tab`.
 The identifier is restricted to the web contents that it is registered to and is only valid for 10 seconds.
 
+#### `contents.getOrCreateDevToolsTargetId()`
+
+Returns `string` - The Chrome DevTools Protocol
+[TargetID](https://chromedevtools.github.io/devtools-protocol/tot/Target/#type-TargetID)
+associated with this WebContents. This is the reverse of
+[`webContents.fromDevToolsTargetId()`](#webcontentsfromdevtoolstargetidtargetid).
+
+> [!NOTE]
+> This method creates a new DevTools agent for this WebContents if one does not already exist.
+
 #### `contents.getOSProcessId()`
 
 Returns `Integer` - The operating system `pid` of the associated renderer