0.11.1

This release adds support for the latest model releases, and makes improvements to base memory and file tools. 

## 🧠 Improved LLM model support 
- Added support for Claude Opus 4.1 and GPT-5 models ([#3806](https://github.com/letta-ai/letta/commit/5fda204842c7c4c0ead8721e272f426ac9695c8b))
- Added `minimal` option for `reasoning_effort` parameter in to `LLMConfig` ([#3816](https://github.com/letta-ai/letta/commit/2d1b78081f6226f442e616d8fe7bf9fad934d519))

## 🔨 Built-in tool improvements 
- Removed optional argument for `memory_replace` to improve reliability ([#3800](https://github.com/letta-ai/letta/commit/341bf4554be5509fcb00a1c86b70d9aa19a35622))
- Make `grep` tool for files paginated ([#3815](https://github.com/letta-ai/letta/pull/2756/commits/182e5706720ca4542a9aa32e49f072936e679b62))