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, 33 insertions, 32 deletions

diff --git a/crates/mozart/src/commands.rs b/crates/mozart/src/commands.rs
index 83ff7b8..694b4e1 100644
--- a/crates/mozart/src/commands.rs
+++ b/crates/mozart/src/commands.rs
@@ -194,38 +194,39 @@ pub enum Commands {
 }
 
 pub fn execute(cli: &Cli) -> anyhow::Result<()> {
+    let console = crate::console::Console::from_cli(cli);
     match &cli.command {
-        Commands::About(args) => about::execute(args, cli),
-        Commands::Archive(args) => archive::execute(args, cli),
-        Commands::Audit(args) => audit::execute(args, cli),
-        Commands::Browse(args) => browse::execute(args, cli),
-        Commands::Bump(args) => bump::execute(args, cli),
-        Commands::CheckPlatformReqs(args) => check_platform_reqs::execute(args, cli),
-        Commands::ClearCache(args) => clear_cache::execute(args, cli),
-        Commands::Config(args) => config::execute(args, cli),
-        Commands::CreateProject(args) => create_project::execute(args, cli),
-        Commands::Depends(args) => depends::execute(args, cli),
-        Commands::Diagnose(args) => diagnose::execute(args, cli),
-        Commands::DumpAutoload(args) => dump_autoload::execute(args, cli),
-        Commands::Exec(args) => exec::execute(args, cli),
-        Commands::Fund(args) => fund::execute(args, cli),
-        Commands::Global(args) => global::execute(args, cli),
-        Commands::Init(args) => init::execute(args, cli),
-        Commands::Install(args) => install::execute(args, cli),
-        Commands::Licenses(args) => licenses::execute(args, cli),
-        Commands::Outdated(args) => outdated::execute(args, cli),
-        Commands::Prohibits(args) => prohibits::execute(args, cli),
-        Commands::Reinstall(args) => reinstall::execute(args, cli),
-        Commands::Remove(args) => remove::execute(args, cli),
-        Commands::Repository(args) => repository::execute(args, cli),
-        Commands::Require(args) => require::execute(args, cli),
-        Commands::RunScript(args) => run_script::execute(args, cli),
-        Commands::Search(args) => search::execute(args, cli),
-        Commands::SelfUpdate(args) => self_update::execute(args, cli),
-        Commands::Show(args) => show::execute(args, cli),
-        Commands::Status(args) => status::execute(args, cli),
-        Commands::Suggests(args) => suggests::execute(args, cli),
-        Commands::Update(args) => update::execute(args, cli),
-        Commands::Validate(args) => validate::execute(args, cli),
+        Commands::About(args) => about::execute(args, cli, &console),
+        Commands::Archive(args) => archive::execute(args, cli, &console),
+        Commands::Audit(args) => audit::execute(args, cli, &console),
+        Commands::Browse(args) => browse::execute(args, cli, &console),
+        Commands::Bump(args) => bump::execute(args, cli, &console),
+        Commands::CheckPlatformReqs(args) => check_platform_reqs::execute(args, cli, &console),
+        Commands::ClearCache(args) => clear_cache::execute(args, cli, &console),
+        Commands::Config(args) => config::execute(args, cli, &console),
+        Commands::CreateProject(args) => create_project::execute(args, cli, &console),
+        Commands::Depends(args) => depends::execute(args, cli, &console),
+        Commands::Diagnose(args) => diagnose::execute(args, cli, &console),
+        Commands::DumpAutoload(args) => dump_autoload::execute(args, cli, &console),
+        Commands::Exec(args) => exec::execute(args, cli, &console),
+        Commands::Fund(args) => fund::execute(args, cli, &console),
+        Commands::Global(args) => global::execute(args, cli, &console),
+        Commands::Init(args) => init::execute(args, cli, &console),
+        Commands::Install(args) => install::execute(args, cli, &console),
+        Commands::Licenses(args) => licenses::execute(args, cli, &console),
+        Commands::Outdated(args) => outdated::execute(args, cli, &console),
+        Commands::Prohibits(args) => prohibits::execute(args, cli, &console),
+        Commands::Reinstall(args) => reinstall::execute(args, cli, &console),
+        Commands::Remove(args) => remove::execute(args, cli, &console),
+        Commands::Repository(args) => repository::execute(args, cli, &console),
+        Commands::Require(args) => require::execute(args, cli, &console),
+        Commands::RunScript(args) => run_script::execute(args, cli, &console),
+        Commands::Search(args) => search::execute(args, cli, &console),
+        Commands::SelfUpdate(args) => self_update::execute(args, cli, &console),
+        Commands::Show(args) => show::execute(args, cli, &console),
+        Commands::Status(args) => status::execute(args, cli, &console),
+        Commands::Suggests(args) => suggests::execute(args, cli, &console),
+        Commands::Update(args) => update::execute(args, cli, &console),
+        Commands::Validate(args) => validate::execute(args, cli, &console),
     }
 }