feat[#1540]: Base changes for cli list sessions

[parkeregli]

I just reused what the ui was using to get the session list and then added a subcommand for "goose session". It checks to see if the subcommand is list and if not runs goose session as normal. I also added an example for arguments such as -v.

[salman1993]

rename to handle_session_list

[salman1993]

currently the output looks like this:

❯ goose session list
Available sessions:
  20250307_121402
  20250307_122909
  20250307_125332
  20250307_125441
  20250307_112710
  20250307_121343
  20250310_112933
  20250307_112732
  20250307_124641

i think it'd be nicer to do sth similar to what we have in goose-server routes:

goose/crates/goose-server/src/routes/session.rs

Lines 47 to 79 in fa9bb9e

	let sessions = match session::list_sessions() {
	Ok(sessions) => sessions,
	Err(e) => {
	tracing::error!("Failed to list sessions: {:?}", e);
	return Err(StatusCode::INTERNAL_SERVER_ERROR);
	}
	};
	let session_infos = sessions
	.into_iter()
	.map(|(id, path)| {
	// Get last modified time as string
	let modified = path
	.metadata()
	.and_then(|m| m.modified())
	.map(|time| {
	chrono::DateTime::<chrono::Utc>::from(time)
	.format("%Y-%m-%d %H:%M:%S UTC")
	.to_string()
	})
	.unwrap_or_else(|_| "Unknown".to_string());
	// Get session description
	let metadata = session::read_metadata(&path).expect("Failed to read session metadata");
	SessionInfo {
	id,
	path: path.to_string_lossy().to_string(),
	modified,
	metadata,
	}
	})
	.collect();

then we can print sth like this:

[session_name] - [description]  - [modified date]

[salman1993]

thanks for contributing. requested few changes on how sessions get listed

[parkeregli]

thanks for contributing. requested few changes on how sessions get listed

Thanks for the review! I tried to keep it simple and figured there would be some changes that needed to be made. I'll get working on the changes ASAP

[parkeregli]

I made the requested changes by @salman1993 as well as some code maintainability changes. I held off on the --quiet flag as I want this initial scope to get into main and then we can start adding flags as needed