Fix Psalm InvalidArgument errors in DocsCommand for route argument type

[Copilot]

Command::argument() returns mixed (string|array), causing Psalm to flag both getByName() and route() calls in DocsCommand::handle() since both expect string/BackedEnum|string.

Changes

• src/Commands/DocsCommand.php: Replace (string) cast with a /** @var string $routeName */ annotation — Psalm doesn't fully narrow types through runtime casts, but respects @var for static type inference, resolving both:
  • getByName(string $name) on line 42
  • route(BackedEnum|string $name) on line 54

// Before
$routeName = $this->argument('route'); // mixed: string|array

// After
/** @var string $routeName */
$routeName = $this->argument('route'); // Psalm sees: string

---

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.78%. Comparing base (278e6c3) to head (fb45ab6).
⚠️ Report is 1 commits behind head on laravel13.

Additional details and impacted files

@@             Coverage Diff              @@
##             laravel13      #86   +/-   ##
============================================
  Coverage        99.78%   99.78%           
  Complexity         134      134           
============================================
  Files               24       24           
  Lines              456      456           
============================================
  Hits               455      455           
  Misses               1        1           

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