nfc: Add Amiibo support (REOPENED) (#4337)

* Initial implementation

* Various fixes and new features

* Address some review comments

* Fixes

* Address more comments

* Use g_hle_lock

* Add more state checking, remove unneeded include

* Minor changes

src/citra_qt/main.h

@@ -166,6 +166,8 @@ private slots:
     void OnCIAInstallFinished();
     void OnMenuRecentFile();
     void OnConfigure();
+    void OnLoadAmiibo();
+    void OnRemoveAmiibo();
     void OnToggleFilterBar();
     void OnDisplayTitleBars(bool);
     void ToggleFullscreen();