Merge pull request 'feat/list-langs' (#4) from feat/list-langs into develop

Reviewed-on: KeshavAnandCode/foreign-thon#4

src/foreignthon/cli.py

@@ -274,7 +274,25 @@ def check(file: Path):
         click.echo(f"✗ {e}", err=True)
         sys.exit(1)
 
+@main.command(context_settings=CONTEXT_SETTINGS)
+def langs():
+    """List all installed language packs."""
+    from .pack import _discover_packs
 
+    packs = _discover_packs()
+    if not packs:
+        click.echo("No language packs installed.")
+        click.echo("Try: pip install foreignthon-es")
+        return
+
+    click.echo("Installed language packs:")
+    for code, module in sorted(packs.items()):
+        import json
+        data = json.loads(module.get_pack_path().read_text(encoding="utf-8"))
+        name = data["meta"].get("name", code)
+        native = data["meta"].get("native_name", "")
+        click.echo(f"  {code:<6} {name} ({native})")
+        
 @main.command("pack", context_settings=CONTEXT_SETTINGS)
 @click.argument("json_file", type=click.Path(exists=True, path_type=Path))
 def validate_pack(json_file: Path):