feat: show tool call output in terminal ui

[ShubyM]

Attempts to implement #448 by truncating the tool call output. If anyone has suggestions or better ideas feel free to let me know!

Before:

After:

[droot]

I am wondering if we should add a flag to opt-in to display output (without truncation).

[droot]

@ShubyM The change is looking good.

While you are at it, can we also fix the alignment for tool request/response. Mainly following changes:

1. Running: <tool> should have a new line before it (no line spacing looks strange)
2. Tool output is not aligned with anything

I think if you render these through markdown you will get the line spacing and left/right spaceing automatically. We used to have that and I think it got lost during the refactoring.

[ShubyM]

With markdown rendering on the tool call response we get an output that looks like this:

I'm not sure if there is an easy way to fix the table alignment when using the markdown rendering

[droot]

With markdown rendering on the tool call response we get an output that looks like this:

I'm not sure if there is an easy way to fix the table alignment when using the markdown rendering

This is an improvement over what we have, so merging it in. We might tweak the truncation limit to something lower.