Aider v0.56.0

• Enables prompt caching for Sonnet via OpenRouter by @fry69
• Enables 8k output tokens for Sonnet via VertexAI and DeepSeek V2.5.
• New /report command to open your browser with a pre-populated GitHub Issue.
• New --chat-language switch to set the spoken language.
• Now --[no-]suggest-shell-commands controls both prompting for and offering to execute shell commands.
• Check key imports on launch, provide helpful error message if dependencies aren't available.
• Renamed --models to --list-models by @fry69.
• Numerous bug fixes for corner case crashes.
• Aider wrote 56% of the code in this release.