build: update turbo

[robdecker]

This pull request is for: (mark with an "x")

• [ ] examples/*
• [ ] modules/next
• [ ] packages/next-drupal
• [ ] starters/basic-starter
• [ ] starters/graphql-starter
• [ ] starters/pages-starter
• [x] Other

Describe your changes

• Updates the Turbo Repo package from v1.x to v2.x.
• Adds .turbo to the git ignore file.

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Name	Status	Preview	Comments	Updated (UTC)
next-drupal-v-next	❌ Failed (Inspect)			Jul 2, 2024 0:05am

3 Ignored Deployments

Name	Status	Preview	Comments	Updated (UTC)
next-drupal	⬜️ Ignored (Inspect)	Visit Preview		Jul 2, 2024 0:05am
next-drupal-next	⬜️ Ignored (Inspect)	Visit Preview		Jul 2, 2024 0:05am
next-drupal-v1-6	⬜️ Ignored (Inspect)	Visit Preview		Jul 2, 2024 0:05am