## Objective

Document newly added `git_panel` settings in the all-settings reference,
and fix related docs mismatches.

## Solution

- Document `tree_view`, `show_count_badge`, `diff_stats`,
`commit_title_max_length`, and `entry_primary_click_action`
- Document missing `file_icons` / `folder_indicator` for `git_panel`
- Correct `dock` defaults for git/collaboration/outline panels to match
`assets/settings/default.json` (`right`)

## Testing

Docs-only changes; no runtime behavior change.

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Release Notes:

- N/A

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Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Kirill Bulatov <kirill@zed.dev>