AK: Move some of LogStream out of line & add overloads for smart pointers.

AK/RefPtr.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <AK/LogStream.h>
 #include <AK/NonnullRefPtr.h>
 #include <AK/Types.h>
 
@@ -203,6 +204,12 @@ private:
     T* m_ptr = nullptr;
 };
 
+template<typename T>
+inline const LogStream& operator<<(const LogStream& stream, const RefPtr<T>& value)
+{
+    return stream << value.ptr();
+}
+
 }
 
 using AK::RefPtr;