Fix FileVisitor issues with wrong class detection

It seems the php parser is using phpdocs and deciding that
 something like
/**
 * @return array<int, string|int>
 */
is a class with FQCN `My\Namespace\array<int, string|int>` which
then ofc fails to create a FullyQualifiedClassName.

Author: hgraca

src/Analyzer/FileVisitor.php

@@ -228,6 +228,10 @@ private function handleTypedProperty(Node $node): void
                 return;
             }
 
+            if (!class_exists($type->toString())) {
+                return;
+            }
+
             try {
                 $this->classDescriptionBuilder
                     ->addDependency(new ClassDependency($type->toString(), $node->getLine()));
@@ -288,7 +292,7 @@ private function handleReturnTypeDependency(Node $node): void
     {
         if ($node instanceof Node\Stmt\ClassMethod) {
             $returnType = $node->returnType;
-            if ($returnType instanceof Node\Name\FullyQualified) {
+            if ($returnType instanceof Node\Name\FullyQualified && class_exists($returnType->toString())) {
                 $this->classDescriptionBuilder
                     ->addDependency(new ClassDependency($returnType->toString(), $returnType->getLine()));
             }
@@ -300,9 +304,9 @@ private function handleAttributeNode(Node $node): void
         if ($node instanceof Node\Attribute) {
             $nodeName = $node->name;
 
-            if ($nodeName instanceof Node\Name\FullyQualified) {
+            if ($nodeName instanceof Node\Name\FullyQualified && class_exists($nodeName->toString())) {
                 $this->classDescriptionBuilder
-                    ->addAttribute($node->name->toString(), $node->getLine());
+                    ->addAttribute($nodeName->toString(), $node->getLine());
             }
         }
     }
@@ -337,6 +341,10 @@ private function addParamDependency(Node\Param $node): void
             return;
         }
 
+        if (!class_exists($type->toString())) {
+            return;
+        }
+
         $this->classDescriptionBuilder
             ->addDependency(new ClassDependency($type->toString(), $node->getLine()));
     }