For read_file and edit_file, show the worktree-relative path if there's
only one visible worktree, and the "full path" otherwise. Also restores
the display of line numbers for read_file calls.
Release Notes:
- N/A
schemars was passing along the newlines from the doc comments. This
should make these closer to the markdown file versions we had in the old
agent.
Release Notes:
- N/A
Cole Miller
Ben Brandt
