Prompt format improvements

remove input from InstructionPrompt (was Alpaca-specific, AlpacaPromptFormat still supports it)
improve error reporting when using exponent backoff retries

add text prompt format. Use simple text prompts, e.g. with OpenAIChatModel:

const textStream = await streamText(
new OpenAIChatModel({
  model: "gpt-3.5-turbo",
}).withTextPrompt(),
"Write a short story about a robot learning to love."
);

add .withTextPromptFormat to LlamaCppTextGenerationModel for simplified prompt construction:

const textStream = await streamText(
new LlamaCppTextGenerationModel({
  // ...
}).withTextPromptFormat(Llama2PromptFormat.text()),
"Write a short story about a robot learning to love."
);

add FunctionListToolCallPromptFormat to simplify tool calls with text models

add .asToolCallGenerationModel() to OllamaTextGenerationModel to simplify tool calls:

const { tool, args, toolCall, result } = await useTool(
new OllamaTextGenerationModel({
  model: "mistral",
  temperature: 0,
}).asToolCallGenerationModel(FunctionListToolCallPromptFormat.text()),
calculator,
"What's fourteen times twelve?"
);

vercel / modelfusion

Prompt format improvements #182