Add check / indication for Valet running

[cheesegrits]

I've been using Herd with xdebug happily for a year or so, no problems. Haven't touched Valet since the day I installed Herd and turned Valet / PHP Monitor off.

Today, I went to pick up debugging a project, and xdebug wouldn't connect. I tried all the usual tricks to get it connecting again, nothing worked. After a couple of frustrating hours, I finally added a php_info route to one of my projects ... and realized it was running the Homebrew PHP, with no xdebug in it. So I checked, and somehow Valet had started running again, so had taken over serving up my *.test domains. I did a "valet stop", and everything instantly started working again.

I didn't do anything to start Valet again. I literally went to bed last night in the middle of debugging, got up today and sat back down at the computer. No reboots, no updates. I even checked my terminal history, which goes back 3 years, and the last valet command I issued before today was "valet stop". So, no clue how it got restarted.

Anyway ... I think it would be a very useful feature to add a check and a warning somewhere prominent if Herd detects that Valet is running. As it stands, there is no indication anywhere that Herd is no longer serving those sites.