feat(response): handle JSON Lines

[alphonseb]

What

A tentative way to parse both JSON and JSON lines API responses and send back a JSON string as the tool's response.

Why

Query Suggestions' API endpoint /1/logs responds with the logs in a JSON lines format, which will throw errors when calling response.json() (or JSON.parse).
Seeing as how valuable it could be to troubleshoot a Query Suggestions build with an LLM ("Why is {query} missing in my suggestions index" -> "It has less than 2 results"), I'm proposing this way of decoding all responses.

Tests

• Tested with debugger
• Added test
• Test with LLM client (not done because out of credits)