Simplify the steps for getting a local environment started

[jorbin]

Currently, ​the instructions for getting started are hard to follow. They require you to manually check for prerequisites on your machine and run 4 separate commands. Some of these steps can be simplified.

[jorbin]

I am envisioning two things: First is a new script in tools/local-env that checks for prerequises and reports failures in a friendly manner.

The second is a change to package.json so that a new npm run getstarted command which will run the preflight check from step one and the other which does the steps from ​https://github.com/WordPress/wordpress-develop/blob/f40b60d4b2f00e6342753df4a1dc247fc99e286c/README.md#to-start-the-development-environment-for-the-first-time

It could also potentially call another new script which would print out some friendly info such as the username:password and links to make/core

[wildworks]

This ticket was featured in 6.9 Bug Scrub today.

Slack Link: ​https://wordpress.slack.com/archives/C02RQBWTW/p1759744031922919

[wildworks]

Since 6.9 Beta1 is just around the corner and there has been no activity for about two months, I am changing the milestone of this ticket to Future Release. If you can do something about it, please feel free to change the status.