v12.3.0

• Fix a bug preventing web framework's dev-mode from working out-of-box with Firebase Authentication. (#5894)
• Address additional cases where we were attempting to deploy a framework's development bundle (#5895)
• NextJS rewrites should be prefixed with the basePath defined in next.config.js (#5923)
• Web Frameworks emulators will again respect existing Cloud Functions rewrites (#5923)
• Web Frameworks rewrites/redirects/headers will only prepend those in firebase.json if there's a baseUrl (#5923)
• Fixes issue where Authentication emulator creates a user if empty email and empty password is provided. (#5639)
• Improve error message raised when --import flag directory does not exist. (#5851)
• Switch ext:dev:init to default 'billingRequired' to true in extension.yaml
• Remove LOCATION param from the extensions.yaml template for ext:dev:init
• Support Astro hybrid rendering (#5898)