Added custom QSS to make NUSGet look nice and pretty (still WIP)

Massive thanks to Isla and Alex from WiiLink for making all the styling I'm using here.

qt/py/ui_WrapCheckboxWidget.py

@@ -0,0 +1,46 @@
+from PySide6.QtCore import Qt, QSize
+from PySide6.QtWidgets import QCheckBox, QHBoxLayout, QLabel, QWidget, QSizePolicy, QLayout
+
+class WrapCheckboxWidget(QWidget):
+    def __init__(self, text, parent=None):
+        super().__init__(parent)
+        self.setAttribute(Qt.WA_StyledBackground, True)
+        self.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.MinimumExpanding)
+
+        self.checkbox = QCheckBox("")
+        sizePolicy1 = QSizePolicy(QSizePolicy.Policy.Maximum, QSizePolicy.Policy.Fixed)
+        sizePolicy1.setHorizontalStretch(0)
+        sizePolicy1.setVerticalStretch(0)
+        sizePolicy1.setHeightForWidth(self.checkbox.sizePolicy().hasHeightForWidth())
+        self.checkbox.setSizePolicy(sizePolicy1)
+
+        self.label = QLabel(text)
+        self.label.setAlignment(Qt.AlignVCenter | Qt.AlignLeft)
+        self.label.setWordWrap(True)
+        self.label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
+
+        layout = QHBoxLayout(self)
+        layout.setContentsMargins(5, 5, 5, 5)
+        layout.setSizeConstraint(QLayout.SetMinimumSize)
+        layout.addWidget(self.checkbox)
+        layout.addWidget(self.label)
+
+        # Connect signals so that clicking the label still changes the state of the checkbox.
+        def toggle_checkbox(event):
+            if self.checkbox.isEnabled() and event.button() == Qt.LeftButton:
+                self.checkbox.toggle()
+        self.label.mousePressEvent = toggle_checkbox
+
+        # Bind checkbox stuff for easier access.
+        self.toggled = self.checkbox.toggled
+
+    def isChecked(self):
+        return self.checkbox.isChecked()
+
+    def setChecked(self, checked):
+        self.checkbox.setChecked(checked)
+
+    def setEnabled(self, enabled):
+        super().setEnabled(enabled)
+        self.checkbox.setEnabled(enabled)
+        self.label.setEnabled(enabled)