Lots of small docs improvements (#1251)

* tasks no longer inside a group in the side menu (and added “cron”)

* Delay using a timezone

* Added React Not Defined error to the troubleshooting page

* Improved the React common problem

* Link to v2 docs

* New Development section and entry in Common Problems

* Concurrently running the terminal

* Fixed the .env weirdness

* Added section on creating PATs for Github actions

* Improved the Machine spec and limits page

* Quick start steps now have nice images

* Added a diagram for the lifecycle functions

* Added note about onFailure

* CRON -> cron/Cron

* Updated the cli-dev steps for the concurrently package

* Fixed capital letter

* Updated diagram text

* Removed dead page

docs/triggering.mdx

@@ -446,6 +446,8 @@ await myTask.trigger({ some: "data" }, { delay: "1h52m18s" });
 await myTask.trigger({ some: "data" }, { delay: "2024-12-01T00:00:00" });
 // Delay using a Date object
 await myTask.trigger({ some: "data" }, { delay: new Date(Date.now() + 1000 * 60 * 60) });
+// Delay using a timezone
+await myTask.trigger({ some: "data" }, { delay: new Date('2024-07-23T11:50:00+02:00') });
 ```
 
 Runs that are delayed and have not been enqueued yet will display in the dashboard with a "Delayed" status: