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-terminal/src/page_list.rs

@@ -1,15 +1,25 @@
 //! Linked terminal pages, byte-bounded history, and stable tracked coordinates.
-use crate::{
-    page::{
-        self, Adjustment, Capacity, Cell, ContentTag, Error, Page, Row, SemanticContent,
-        SemanticPrompt, Wide,
-    },
-    point::{Coordinate, Point, Tag},
-};
 use std::{
     collections::HashMap,
     sync::atomic::{AtomicUsize, Ordering},
 };
+
+use crate::{
+    page::{
+        self,
+        Adjustment,
+        Capacity,
+        Cell,
+        ContentTag,
+        Error,
+        Page,
+        Row,
+        SemanticContent,
+        SemanticPrompt,
+        Wide,
+    },
+    point::{Coordinate, Point, Tag},
+};
 /// Slab index and generation; stale references never alias a reused node.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct NodeId {
@@ -7214,8 +7224,9 @@ mod tests {
     }
     #[test]
     fn page_list_resize_reflow_exceeds_style_memory_forcing_capacity_increase() {
-        use crate::style::{Color, Style};
         use ghostty_vt::color::Rgb;
+
+        use crate::style::{Color, Style};
         let mut s = two_page_fixture(page::STD_CAPACITY.styles - 1, 1, Some(0));
         assert_ne!(s.first, s.last);
         assert_eq!(s.node(s.first.unwrap()).unwrap().next, s.last);