* changed AIFunction to FunctionTool and @ai_function to @tool
* test and mypy fixes
* mypy fix
* switch function tool to always_require
* fix noop
* fix github copilot imports
* test fixes
* fix ollama test
* fixes for tests
* fix tests
* reverted change to always_require and extended timeout
* fix test
* removed display_name, renamed context_providers, middleware and AggregateContextProvider
* fixes
* fixed test
* testfix
* removed mistakenly put back test
* updated new test
* rename middlewares to middleware
* middleware fixes