Use PHP_BINARY and base_path in test process

Replaces hardcoded 'php' with PHP_BINARY and sets the working directory to base_path() when running the test listing process. This improves compatibility with different PHP environments and ensures the process runs in the correct directory.

Author: sagalbot

src/Console/InstallCommand.php

@@ -204,7 +204,7 @@ protected function determineTestEnforcement(bool $ask = true): bool
         $hasMinimumTests = false;
 
         if (file_exists(base_path('vendor/bin/phpunit'))) {
-            $process = new Process(['php', 'artisan', 'test', '--list-tests']);
+            $process = new Process([PHP_BINARY, 'artisan', 'test', '--list-tests'], base_path());
             $process->run();
 
             /** Count the number of tests - they'll always have :: between the filename and test name */