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, 8 insertions, 7 deletions

diff --git a/crates/mozart/src/commands/browse.rs b/crates/mozart/src/commands/browse.rs
index d17c6d0..0a89ae7 100644
--- a/crates/mozart/src/commands/browse.rs
+++ b/crates/mozart/src/commands/browse.rs
@@ -18,7 +18,11 @@ pub struct BrowseArgs {
 
 // ─── Main entry point ────────────────────────────────────────────────────────
 
-pub fn execute(args: &BrowseArgs, cli: &super::Cli) -> anyhow::Result<()> {
+pub fn execute(
+    args: &BrowseArgs,
+    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()?,
@@ -46,21 +50,18 @@ pub fn execute(args: &BrowseArgs, cli: &super::Cli) -> anyhow::Result<()> {
                 if args.show {
                     println!("{}", url);
                 } else {
-                    println!(
-                        "{}",
-                        crate::console::info(&format!("Opening {} in browser.", url))
-                    );
+                    console.info(&format!("Opening {} in browser.", url));
                     open_browser(&url)?;
                 }
             }
             None => {
-                eprintln!(
+                console.info(&format!(
                     "{}",
                     crate::console::warning(&format!(
                         "No URL found for package \"{}\".",
                         package_name
                     ))
-                );
+                ));
                 exit_code = 1;
             }
         }