Simplified project scripts

We've simplified how scripts work on your projects. Previously, you could add any number of scripts per project, organized by stage and manually ordered. In practice, almost everyone only ever needed one script per stage, so we've replaced that with two straightforward fields on every project:

• Before build - runs before your project is built.
• After build - runs after your project has finished building.

You'll find them on your project's Scripts tab. If you had existing deployment scripts, they've been automatically migrated into these two fields for you.

This change also moves the documentation for scripts from the Deployments section to the Projects section, where it now lives alongside the rest of your project configuration.