Implement MainRAM management dialog😁 (#1248)

* Implement MainRAM management dialog

* Modify RAMInfoDialog

- use emuThread to avoid a race condition.
- replace RAMUpdateThread to QTimer

Co-Authored-By: RSDuck <RSDuck@users.noreply.github.com>

* Update src/frontend/qt_sdl/RAMInfoDialog.cpp

small typo

Co-authored-by: Rayyan Ansari <68647953+RayyanAnsari@users.noreply.github.com>

* Update src/frontend/qt_sdl/RAMInfoDialog.h

small typo

Co-authored-by: Rayyan Ansari <68647953+RayyanAnsari@users.noreply.github.com>

* typo errors in RAMInfoDialog

Rrevious->Previous

* add new line to the end of the file

Co-authored-by: Rayyan Ansari <rayyan@ansari.sh>

* enable raminfo when cart is inserted

* Modify that only the 'value' item can be edited in RAMinfoDialog

* fix: function name incorrect error

* fix: function name incorrect error2

* fix: wrong way to get ram value

Co-authored-by: RSDuck <RSDuck@users.noreply.github.com>
Co-authored-by: Rayyan Ansari <68647953+RayyanAnsari@users.noreply.github.com>
Co-authored-by: Rayyan Ansari <rayyan@ansari.sh>

src/frontend/qt_sdl/main.h

@@ -252,6 +252,7 @@ private slots:
     void onSetupCheats();
     void onCheatsDialogFinished(int res);
     void onROMInfo();
+    void onRAMInfo();
     void onOpenTitleManager();
 
     void onOpenEmuSettings();
@@ -341,6 +342,7 @@ public:
     QAction* actEnableCheats;
     QAction* actSetupCheats;
     QAction* actROMInfo;
+    QAction* actRAMInfo;
     QAction* actTitleManager;
 
     QAction* actEmuSettings;