kernel: Improve accuracy of KResourceLimit emulation (#7221)

* core: Refactor resource limits

* svc: Implement SetResourceLimitLimitValues

* Also correct existing name and add missing error codes

src/core/hle/service/am/am.h

@@ -34,6 +34,10 @@ namespace Service::FS {
 enum class MediaType : u32;
 }
 
+namespace Kernel {
+class Mutex;
+}
+
 namespace Service::AM {
 
 namespace ErrCodes {