feat: complete structured CLI output

- unify human, plain, and JSON CLI output modes

- standardize diagnostics, lifecycle events, colors, quiet, and verbose handling

- preserve argument forwarding and improve CLI help and summaries

- document and release version 0.9.5

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dcr"
-version = "0.9.0"
+version = "0.9.5"
 edition = "2024"
 build = "build.rs"
 description = "DCR is a utility for managing C/C++ projects in a Cargo-like style."
@@ -75,6 +75,11 @@ serde_json = "1"
 ctrlc = "3"
 fatfs = { version = "0.3", optional = true }
 
+# Logging
+log = "0.4.34"
+env_logger = "0.11.11"
+owo-colors = { version = "4", features = ["supports-colors"] }
+
 [profile.release]
 opt-level = "z"
 lto = "thin"
@@ -97,4 +102,4 @@ debug = "line-tables-only"
 
 [profile.dev.package."*"]
 opt-level = 1
-debug = false
+debug = false