style: apply nightly rustfmt import grouping across the workspace

rustfmt.toml sets group_imports, imports_granularity and imports_layout,
which are nightly-only; agents formatted with stable rustfmt, which
ignored them. This is a formatting-only pass with `cargo +nightly fmt`.

Test Plan:
- cargo clippy --workspace --all-targets -- -D warnings
- cargo test --workspace

crates/ghostty-inspector/src/widgets/surface.rs

@@ -3,9 +3,11 @@
 
 use dear_imgui_rs::{DockNodeFlags, TableFlags, TreeNodeFlags, Ui, WindowFlags};
 use ghostty_renderer::size::{Coordinate, CoordinateTag, Size, SurfaceCoord};
-use ghostty_terminal::page_list::Pin;
-use ghostty_terminal::point::{Coordinate as PointCoordinate, Tag};
-use ghostty_terminal::terminal::Terminal;
+use ghostty_terminal::{
+    page_list::Pin,
+    point::{Coordinate as PointCoordinate, Tag},
+    terminal::Terminal,
+};
 
 use super::{key, renderer, terminal, termio};
 use crate::dock::begin_window;