welcome: add a first launch welcome page with doctor integration

fixes #760

quickshell/Modals/Greeter/GreeterSettingsCard.qml

@@ -0,0 +1,78 @@
+import QtQuick
+import qs.Common
+import qs.Widgets
+
+Rectangle {
+    id: root
+
+    property string iconName: ""
+    property string title: ""
+    property string description: ""
+
+    signal clicked
+
+    readonly property real iconContainerSize: Math.round(Theme.iconSize * 1.5)
+
+    height: Math.round(Theme.fontSizeMedium * 4.5)
+    radius: Theme.cornerRadius
+    color: Theme.surfaceContainerHigh
+
+    Rectangle {
+        anchors.fill: parent
+        radius: parent.radius
+        color: Theme.primary
+        opacity: mouseArea.containsMouse ? 0.12 : 0
+    }
+
+    Row {
+        anchors.left: parent.left
+        anchors.right: parent.right
+        anchors.verticalCenter: parent.verticalCenter
+        anchors.margins: Theme.spacingM
+        spacing: Theme.spacingM
+
+        Rectangle {
+            width: root.iconContainerSize
+            height: root.iconContainerSize
+            radius: Math.round(root.iconContainerSize * 0.28)
+            color: Theme.primary
+            anchors.verticalCenter: parent.verticalCenter
+
+            DankIcon {
+                anchors.centerIn: parent
+                name: root.iconName
+                size: Theme.iconSize - 4
+                color: Theme.primaryText
+            }
+        }
+
+        Column {
+            anchors.verticalCenter: parent.verticalCenter
+            spacing: 2
+            width: parent.width - root.iconContainerSize - Theme.spacingM
+
+            StyledText {
+                text: root.title
+                font.pixelSize: Theme.fontSizeSmall
+                font.weight: Font.Medium
+                color: Theme.surfaceText
+            }
+
+            StyledText {
+                text: root.description
+                font.pixelSize: Theme.fontSizeSmall - 1
+                color: Theme.surfaceVariantText
+                width: parent.width
+                elide: Text.ElideRight
+            }
+        }
+    }
+
+    MouseArea {
+        id: mouseArea
+        anchors.fill: parent
+        hoverEnabled: true
+        cursorShape: Qt.PointingHandCursor
+        onClicked: root.clicked()
+    }
+}