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/terminal/tests/p1.rs

@@ -1,7 +1,7 @@
+use ghostty_vt::{color::Rgb, sgr::Attribute};
+
 use super::*;
 use crate::page::{Cell, Wide};
-use ghostty_vt::color::Rgb;
-use ghostty_vt::sgr::Attribute;
 
 fn c(t: &Terminal, x: u16, y: u32) -> Cell {
     cell_at(t, pt_screen(x, y))

crates/ghostty-terminal/src/terminal/tests/p3.rs

@@ -1,9 +1,7 @@
+use ghostty_vt::{color::Rgb, modes::Mode, sgr::Attribute as A};
+
 use super::*;
-use crate::page::ContentTag;
-use crate::point::Tag;
-use ghostty_vt::color::Rgb;
-use ghostty_vt::modes::Mode;
-use ghostty_vt::sgr::Attribute as A;
+use crate::{page::ContentTag, point::Tag};
 
 fn cr_lf(t: &mut Terminal) {
     t.carriage_return();

crates/ghostty-terminal/src/terminal/tests/p4.rs

@@ -1,6 +1,6 @@
+use ghostty_vt::{color::Rgb, sgr::Attribute as A};
+
 use super::*;
-use ghostty_vt::color::Rgb;
-use ghostty_vt::sgr::Attribute as A;
 
 const RED: Rgb = Rgb {
     r: 0xFF,

crates/ghostty-terminal/src/terminal/tests/p5.rs

@@ -1,7 +1,7 @@
+use ghostty_vt::{color::Rgb, sgr::Attribute};
+
 use super::*;
 use crate::page::ContentTag;
-use ghostty_vt::color::Rgb;
-use ghostty_vt::sgr::Attribute;
 
 fn prints(t: &mut Terminal, s: &str) {
     for c in s.chars() {

crates/ghostty-terminal/src/terminal/tests/p6.rs

@@ -1,8 +1,7 @@
+use ghostty_vt::{charsets::Slots, color::Rgb, sgr::Attribute};
+
 use super::*;
 use crate::page::{ContentTag, Wide};
-use ghostty_vt::charsets::Slots;
-use ghostty_vt::color::Rgb;
-use ghostty_vt::sgr::Attribute;
 
 /// Zig `for ("...") |c| try t.print(c)`.
 fn pr(t: &mut Terminal, s: &str) {

crates/ghostty-terminal/src/terminal/tests/p7.rs

@@ -1,5 +1,3 @@
-use super::*;
-use crate::page::{ContentTag, SemanticContent, SemanticPrompt as RowPrompt};
 use ghostty_vt::{
     ansi::ProtectedMode,
     color::Rgb,
@@ -8,6 +6,9 @@ use ghostty_vt::{
     sgr::{Attribute as A, Underline},
 };
 
+use super::*;
+use crate::page::{ContentTag, SemanticContent, SemanticPrompt as RowPrompt};
+
 fn pr(t: &mut Terminal, s: &str) {
     for c in s.chars() {
         t.print(u32::from(c)).unwrap();

crates/ghostty-terminal/src/terminal/tests/p8.rs

@@ -1,12 +1,17 @@
+use ghostty_vt::{
+    color::Rgb,
+    osc::{
+        SemanticPrompt as Cmd,
+        semantic_prompt::{Action as A, Click},
+    },
+    sgr::Attribute,
+};
+
 use super::*;
-use crate::page::{ContentTag, SemanticContent, SemanticPrompt as RowPrompt};
-use crate::screen::SemanticClick;
-use ghostty_vt::color::Rgb;
-use ghostty_vt::osc::{
-    SemanticPrompt as Cmd,
-    semantic_prompt::{Action as A, Click},
+use crate::{
+    page::{ContentTag, SemanticContent, SemanticPrompt as RowPrompt},
+    screen::SemanticClick,
 };
-use ghostty_vt::sgr::Attribute;
 
 fn sp(a: A) -> Cmd {
     Cmd::init(a)