Anthropic Tool Support (#1594)
* support anthropic PDF beta
* upstream merge, remove commented out console log line
* Fixing type errors.
the anthropic API does not yet include a "DocumentBlock" for
support PDFs, so an extended type has been added to the endpoint.
* changed document processor to async (matching image processor)
* use the beta api types rather than custom extension
* rudimentary tool testing
* interim commit (tool re-passing, file handling)
* remove merge error
* tidy up, isolate beta classes to utils
* anthropic tool calling support.
* improve handling of directlyAnswer tool
* fix streaming
* slight tidy up to tools flow handling
* fix: dont pass tools in final generation, instead deduce tools from tool results
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Co-authored-by: Nathan Sarrazin <sarrazin.nathan@gmail.com>
