Implementiere farbige Terminal-Ausgabe

- Fügt colored Crate hinzu für bessere visuelle Unterscheidung
- Grün: erfolgreiche Umbenennungen
- Gelb: Dry-run Modus
- Rot: Fehlermeldungen
- Cyan/Bold: Statistik-Zusammenfassung
- Neues --no-color Flag zum Deaktivieren
- Automatische Farberkennung via is_terminal()
- Behebt ungenutzten warn Import
- Aktualisiert Integration-Tests auf neues cargo_bin! Makro

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Cargo.lock

@@ -10,6 +10,7 @@ dependencies = [
  "assert_cmd",
  "assert_fs",
  "clap",
+ "colored",
  "dirs",
  "emojis",
  "env_logger",
@@ -205,6 +206,16 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
 
+[[package]]
+name = "colored"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "117725a109d387c937a1533ce01b450cbde6b88abceea8473c4d7a85853cda3c"
+dependencies = [
+ "lazy_static",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "console"
 version = "0.15.11"
@@ -486,6 +497,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
 [[package]]
 name = "libc"
 version = "0.2.170"