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, 7 insertions, 3 deletions

diff --git a/crates/mozart/src/commands/dump_autoload.rs b/crates/mozart/src/commands/dump_autoload.rs
index 7d5b748..6f38ab9 100644
--- a/crates/mozart/src/commands/dump_autoload.rs
+++ b/crates/mozart/src/commands/dump_autoload.rs
@@ -48,7 +48,11 @@ pub struct DumpAutoloadArgs {
     pub strict_ambiguous: bool,
 }
 
-pub fn execute(args: &DumpAutoloadArgs, cli: &super::Cli) -> anyhow::Result<()> {
+pub fn execute(
+    args: &DumpAutoloadArgs,
+    cli: &super::Cli,
+    console: &crate::console::Console,
+) -> anyhow::Result<()> {
     let working_dir = match &cli.working_dir {
         Some(dir) => PathBuf::from(dir),
         None => std::env::current_dir()?,
@@ -61,7 +65,7 @@ pub fn execute(args: &DumpAutoloadArgs, cli: &super::Cli) -> anyhow::Result<()>
     let suffix = crate::autoload::determine_suffix(&working_dir, &vendor_dir)?;
 
     if args.dry_run {
-        eprintln!("Dry run: would generate autoload files");
+        console.info("Dry run: would generate autoload files");
         return Ok(());
     }
 
@@ -79,7 +83,7 @@ pub fn execute(args: &DumpAutoloadArgs, cli: &super::Cli) -> anyhow::Result<()>
         ignore_platform_reqs: args.ignore_platform_reqs,
     })?;
 
-    eprintln!("Generated autoload files");
+    console.info("Generated autoload files");
 
     Ok(())
 }