Suggestion: Change `"githubPullRequests.notifications"` default

[chrisdias]

I was trying to figure out why my PR notifications were not showing up for Padawan PRs then discovered there is a setting "githubPullRequests.notifications" and that the default is off.

Why is this off? Is it too noisy for everyday use?

In the Padawan case (async agents) it is useful to get the notification...

[alexr00]

githubPullRequests.notifications is actually for showing a blue color on PRs in the Pull Requests view. Now that we have a notifications view we should maybe remove that setting and the blue color entirely.

[chrisdias]

Interesting, I had to turn it on in order to get a PR notification to show up in the Notifications view.