welcome: add a first launch welcome page with doctor integration

fixes #760

quickshell/Modals/Greeter/GreeterQuickLink.qml

@@ -0,0 +1,60 @@
+import QtQuick
+import qs.Common
+import qs.Widgets
+
+Rectangle {
+    id: root
+
+    property string iconName: ""
+    property string title: ""
+    property bool isExternal: false
+
+    signal clicked
+
+    height: Math.round(Theme.fontSizeMedium * 3.1)
+    radius: Theme.cornerRadius
+    color: Theme.surfaceContainerHigh
+
+    Rectangle {
+        anchors.fill: parent
+        radius: parent.radius
+        color: Theme.primary
+        opacity: mouseArea.containsMouse ? 0.12 : 0
+    }
+
+    Row {
+        anchors.centerIn: parent
+        spacing: Theme.spacingS
+
+        DankIcon {
+            name: root.iconName
+            size: Theme.iconSizeSmall + 2
+            color: Theme.primary
+            anchors.verticalCenter: parent.verticalCenter
+        }
+
+        StyledText {
+            text: root.title
+            font.pixelSize: Theme.fontSizeSmall
+            font.weight: Font.Medium
+            color: Theme.surfaceText
+            anchors.verticalCenter: parent.verticalCenter
+        }
+
+        DankIcon {
+            visible: root.isExternal
+            name: "open_in_new"
+            size: Theme.iconSizeSmall - 2
+            color: Theme.surfaceVariantText
+            anchors.verticalCenter: parent.verticalCenter
+        }
+    }
+
+    MouseArea {
+        id: mouseArea
+        anchors.fill: parent
+        hoverEnabled: true
+        cursorShape: Qt.PointingHandCursor
+        onClicked: root.clicked()
+    }
+}