feat(console): add structured error handling, verbosity, and suggestions

Implement Phase 7.2 error handling & UX infrastructure:

- Add exit_code module with MozartError, bail()/bail_silent() helpers,
  and Composer-compatible exit code constants (0-5, 100)
- Redesign Console struct with Verbosity enum (Quiet/Normal/Verbose/
  VeryVerbose/Debug), ANSI auto-detection via IsTerminal, and
  verbosity-gated output methods (info/verbose/debug/error)
- Thread Console through all 33 command execute() signatures
- Replace all std::process::exit() calls with structured MozartError
  returns handled in main()
- Migrate eprintln\! status messages to console.info() for quiet-mode
  suppression
- Add suggest module with Levenshtein distance and "Did you mean?"
  formatting for future package name suggestions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/crates/mozart/src/commands/init.rs b/crates/mozart/src/commands/init.rs
index fb7520f..be104c6 100644
--- a/crates/mozart/src/commands/init.rs
+++ b/crates/mozart/src/commands/init.rs
@@ -55,9 +55,11 @@ pub struct InitArgs {
     pub autoload: Option<String>,
 }
 
-pub fn execute(args: &InitArgs, cli: &super::Cli) -> anyhow::Result<()> {
-    let console = console::Console::new(cli.no_interaction, cli.quiet);
-
+pub fn execute(
+    args: &InitArgs,
+    cli: &super::Cli,
+    console: &console::Console,
+) -> anyhow::Result<()> {
     let working_dir = match &cli.working_dir {
         Some(dir) => PathBuf::from(dir),
         None => std::env::current_dir().context("Failed to get current directory")?,
@@ -78,7 +80,7 @@ pub fn execute(args: &InitArgs, cli: &super::Cli) -> anyhow::Result<()> {
     }
 
     let composer = if console.interactive {
-        build_interactive(args, &console, &working_dir)?
+        build_interactive(args, console, &working_dir)?
     } else {
         build_non_interactive(args, &working_dir)?
     };