Add a config option to disable generating titles or prevent them from using an LLM

[thoasty-dev]

It would be great if we could disable the LLM title-generation feature via a config var. Was wondering why I had random requests to haiku.

ai/src/Middleware/RememberConversation.php

Lines 69 to 84 in e6a470f

	protected function generateTitle(string $prompt): string
	{
	try {
	$response = $this->provider->textGateway()->generateText(
	$this->provider,
	$this->provider->cheapestTextModel(),
	'Generate a concise 3-5 word title for a conversation that starts with the following message. Respond with only the title, no quotes or punctuation.',
	[new UserMessage(Str::limit($prompt, 500))],
	);
	return Str::limit($response->text, 100);
	} catch (Throwable) {
	return Str::limit($prompt, 100, preserveWords: true);
	}
	}
	}