AI21: tools calling support in Langchain (#25635)
This pull request introduces support for the AI21 tools calling feature,
available by the Jamba-1.5 models. When Jamba-1.5 detects the necessity
to invoke a provided tool, as indicated by the 'tools' parameter passed
to the model:
```
class ToolDefinition(TypedDict, total=False):
type: Required[Literal["function"]]
function: Required[FunctionToolDefinition]
class FunctionToolDefinition(TypedDict, total=False):
name: Required[str]
description: str
parameters: ToolParameters
class ToolParameters(TypedDict, total=False):
type: Literal["object"]
properties: Required[Dict[str, Any]]
required: List[str]
```
It will respond with a list of tool calls structured as follows:
```
class ToolCall(AI21BaseModel):
id: str
function: ToolFunction
type: Literal["function"] = "function"
class ToolFunction(AI21BaseModel):
name: str
arguments: str
```
This pull request incorporates the necessary modifications to integrate
this functionality into the ai21-langchain library.
---------
Co-authored-by: asafg <asafg@ai21.com>
Co-authored-by: pazshalev <111360591+pazshalev@users.noreply.github.com>
Co-authored-by: Paz Shalev <pazs@ai21.com>
Co-authored-by: Erick Friis <erick@langchain.dev>
