Add annotation-based cached view support

[Copilot]

Add cached-view support for the 7.x line, using PHPUnit annotations rather than PHP attributes. The WithCachedViews trait compiles views before each test and clears the cache afterward.

• Usage: Add the trait to a test class:

  use Orchestra\Testbench\Concerns\WithCachedViews;
  
  class FeatureTest extends TestCase
  {
      use WithCachedViews;
  
      /** @test */
      public function it_renders_cached_views()
      {
          // ...
      }
  }

• Coverage: Verify compiled views are present during the test and cleared afterward.