feat: add aws sonnet 4.5

[bangonicdd2]

PR Checklist

• Have you checked if it works normally in all models? Ignore this if it doesn't use models.
• Have you checked if it works normally in all web, local, and node hosted versions? If it doesn't, have you blocked it in those versions?
• Have you added type definitions?

Description

Added Sonnet 4.5 model for AWS and removed some deprecated models. Testing shows no issues.