Add rustfmt.toml for explicit styling (#348)

* Propose an explicit .rustfnt.toml
Use 2024 style, 4 spaces for tabs and epand the default width a tad

* Auto-format the existing code with new rules

input-capture/src/error.rs

@@ -12,9 +12,9 @@ pub enum InputCaptureError {
 use std::io;
 #[cfg(all(unix, feature = "layer_shell", not(target_os = "macos")))]
 use wayland_client::{
+    ConnectError, DispatchError,
     backend::WaylandError,
     globals::{BindError, GlobalError},
-    ConnectError, DispatchError,
 };
 
 #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]