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-input/src/binding/action.rs

@@ -3,8 +3,10 @@
 
 #![allow(clippy::needless_raw_string_hashes)]
 
-use std::fmt;
-use std::hash::{Hash, Hasher};
+use std::{
+    fmt,
+    hash::{Hash, Hasher},
+};
 
 use super::Error;
 

crates/ghostty-input/src/binding/mod.rs

@@ -4,19 +4,38 @@
 pub mod action;
 pub mod set;
 
-use std::collections::hash_map::DefaultHasher;
-use std::fmt;
-use std::hash::{Hash, Hasher};
+use std::{
+    collections::hash_map::DefaultHasher,
+    fmt,
+    hash::{Hash, Hasher},
+};
 
 pub use action::{
-    Action, ActionKey, AdjustSelection, CloseTabMode, CopyToClipboard, CrashThread, CursorKey,
-    GotoWindow, InspectorMode, NavigateSearch, Scope, SplitDirection, SplitFocusDirection,
-    SplitResizeDirection, SplitResizeParameter, WriteScreen, WriteScreenAction, WriteScreenFormat,
+    Action,
+    ActionKey,
+    AdjustSelection,
+    CloseTabMode,
+    CopyToClipboard,
+    CrashThread,
+    CursorKey,
+    GotoWindow,
+    InspectorMode,
+    NavigateSearch,
+    Scope,
+    SplitDirection,
+    SplitFocusDirection,
+    SplitResizeDirection,
+    SplitResizeParameter,
+    WriteScreen,
+    WriteScreenAction,
+    WriteScreenFormat,
 };
 pub use set::Set;
 
-use crate::key;
-use crate::key_mods::{self, Mods};
+use crate::{
+    key,
+    key_mods::{self, Mods},
+};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, thiserror::Error)]
 pub enum Error {

crates/ghostty-input/src/binding/tests.rs

@@ -1,9 +1,13 @@
 #![allow(clippy::unwrap_used)]
 
-use super::set::{AppendChainError, EntryFormatter, Value};
-use super::*;
-use crate::key::{Key, KeyEvent};
-use crate::key_mods::Mods;
+use super::{
+    set::{AppendChainError, EntryFormatter, Value},
+    *,
+};
+use crate::{
+    key::{Key, KeyEvent},
+    key_mods::Mods,
+};
 
 fn uni(c: char) -> Trigger {
     Trigger {