Add rustfmt configuration and reformat code

- Document new Rust formatting standards in AGENTS, CODE_MAP, and
  PROGRESS.
- Add rustfmt.toml with style 2024, 2‑space indents, 100‑char width, LF
  endings.
- Apply consistent 2‑space indentation and ordering across source files.
- Minor clean‑up of imports and whitespace to match the new style.

src/logs.rs

@@ -28,10 +28,10 @@ use std::fs::File;
 /// }
 /// ```
 pub fn init_logger() {
-    WriteLogger::init(
-        LevelFilter::Info,
-        Config::default(),
-        File::create("war_in_tunnels.log").expect("Failed to create log file"),
-    )
-    .expect("Failed to initialize logger");
+  WriteLogger::init(
+    LevelFilter::Info,
+    Config::default(),
+    File::create("war_in_tunnels.log").expect("Failed to create log file"),
+  )
+  .expect("Failed to initialize logger");
 }