New playground tutorials

We’ve added 8 new tutorials to our playground to make it easier to get started and trial features.

• “Enabled AdBlocker” to test out visiting websites with Ads
• “Two Tabs” guide for managing more than one tab
• “GitHub Sign In” tutorial to show how to sign in within Browser live view
• “Training Mode” playground for generating code
• “AI Codegen” playground to test out our AI code gen feature
• “Playwright Console” playground to test our playwright code gen
• “Advanced Tips” section with feature examples