Core qt module for libs (#6278)

* Move logger and key signals from libcockatrice_utility to Cockatrice.

Took 9 minutes

* Only link Qt::Core instead of COCKATRICE_QT_MODULES to libraries, if possible.

Took 2 minutes

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/interface/key_signals.h

@@ -0,0 +1,36 @@
+/**
+ * @file key_signals.h
+ * @ingroup Core
+ * @ingroup UI
+ * @brief TODO: Document this.
+ */
+
+#ifndef KEYSIGNALS_H
+#define KEYSIGNALS_H
+
+#include <QEvent>
+#include <QObject>
+
+class KeySignals : public QObject
+{
+    Q_OBJECT
+
+signals:
+    void onEnter();
+    void onCtrlEnter();
+    void onCtrlAltEnter();
+    void onShiftLeft();
+    void onShiftRight();
+    void onDelete();
+    void onCtrlAltMinus();
+    void onCtrlAltEqual();
+    void onCtrlAltLBracket();
+    void onCtrlAltRBracket();
+    void onShiftS();
+    void onCtrlC();
+
+protected:
+    bool eventFilter(QObject *, QEvent *event) override;
+};
+
+#endif