feat: Add ErrorLabel component.

src/components/ErrorLabel.cpp

@@ -0,0 +1,17 @@
+#include "ErrorLabel.h"
+
+ErrorLabel::ErrorLabel(QWidget* aParent)
+    : QLabel(aParent)
+{
+    setObjectName("warn");
+    setWordWrap(true);
+}
+
+void ErrorLabel::setErrorText(const QString& aText)
+{
+    QFont font = this->font();
+    QFontMetrics metrics(font);
+    int width = metrics.width(aText);
+    this->setFixedHeight(metrics.lineSpacing() * (width / this->width()) + 30 );
+    setText(aText);
+}

src/components/ErrorLabel.h

@@ -0,0 +1,14 @@
+#ifndef ERRORLABEL_H
+#define ERRORLABEL_H
+
+#include <QLabel>
+
+class ErrorLabel : public QLabel
+{
+public:
+    ErrorLabel(QWidget* aParent);
+
+    void setErrorText(const QString& aText);
+};
+
+#endif // ERRORLABEL_H