docs: Clarify YouTube API key(YouTube Data API v3 enable) requirement for live route (#20974)

* Add CLI script for youtube live lookup

* Make youtube live debug script standalone

* Update YouTube API key requirement docs

* Clarify YouTube API key requirement for live route

* Adjust YouTube live API key docs

* Enhance YOUTUBE_KEY description with API link

Updated the description for the YOUTUBE_KEY configuration to include a link to the YouTube Data API v3.

* Update youtube Data API v3 enable doc url

Author: dreaifekks

lib/routes/youtube/live.ts

@@ -18,7 +18,8 @@ export const route: Route = {
         requireConfig: [
             {
                 name: 'YOUTUBE_KEY',
-                description: 'YouTube API Key, support multiple keys, split them with `,`, [API Key application](https://console.developers.google.com/)',
+                description:
+                    'YouTube API Key (enable YouTube Data API v3), support multiple keys, split them with `,`, [API Key application](https://console.developers.google.com/), [YouTube Data API v3](https://console.cloud.google.com/apis/library/youtube.googleapis.com)',
             },
         ],
         requirePuppeteer: false,