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-build-data/src/bash.rs

@@ -4,8 +4,13 @@ use std::fmt::Write as _;
 
 use ghostty_config::cli_args::FieldKind;
 
-use crate::chunks_bash::{C0, C1, C2, C3, C4, C5, C6};
-use crate::{actions, config_fields, join_names, join_packed};
+use crate::{
+    actions,
+    chunks_bash::{C0, C1, C2, C3, C4, C5, C6},
+    config_fields,
+    join_names,
+    join_packed,
+};
 
 const COMPGEN_PREFIX: &str = "_compreply compgen -W \"";
 const COMPGEN_SUFFIX: &str = "\" -- \"$cur\"; _add_spaces ;;";

crates/ghostty-build-data/src/lib.rs

@@ -8,9 +8,7 @@
 #![cfg_attr(test, allow(clippy::expect_used))]
 
 use ghostty_cli::Action;
-use ghostty_config::cli_args::FieldKind;
-use ghostty_config::config::Config;
-use ghostty_config::macros::ConfigStruct;
+use ghostty_config::{cli_args::FieldKind, config::Config, macros::ConfigStruct};
 
 pub mod bash;
 pub mod fish;

crates/ghostty-build-data/src/main.rs

@@ -5,8 +5,7 @@
 //! +vim-ftdetect|+vim-ftplugin|+vim-compiler|+terminfo|+mdgen-ghostty-1|
 //! +mdgen-ghostty-5`
 
-use std::io::Write;
-use std::process::ExitCode;
+use std::{io::Write, process::ExitCode};
 
 use ghostty_build_data::Mode;
 

crates/ghostty-build-data/src/sublime.rs

@@ -1,7 +1,9 @@
 //! Sublime syntax (also used by `bat`) (port of `extra/sublime.zig`).
 
-use crate::chunks_sublime::{C0, C1};
-use crate::config_fields;
+use crate::{
+    chunks_sublime::{C0, C1},
+    config_fields,
+};
 
 #[must_use]
 pub fn syntax() -> String {

crates/ghostty-build-data/src/vim.rs

@@ -2,8 +2,10 @@
 
 use std::fmt::Write as _;
 
-use crate::chunks_vim::{C0, C1, C2, C3, C4};
-use crate::config_fields;
+use crate::{
+    chunks_vim::{C0, C1, C2, C3, C4},
+    config_fields,
+};
 
 pub const FTDETECT: &str = C0;
 pub const FTPLUGIN: &str = C1;

crates/ghostty-build-data/src/zsh.rs

@@ -4,8 +4,13 @@ use std::fmt::Write as _;
 
 use ghostty_config::cli_args::FieldKind;
 
-use crate::chunks_zsh::{C0, C1, C2, C3};
-use crate::{actions, config_fields, join_names, join_packed};
+use crate::{
+    actions,
+    chunks_zsh::{C0, C1, C2, C3},
+    config_fields,
+    join_names,
+    join_packed,
+};
 
 const EQUALS_REQUIRED: &str = "=-:::";