launcher: add indicators for flatpak/snap/appimage/nix

fixes #2251

quickshell/Modals/DankLauncherV2/SourceBadge.qml

@@ -0,0 +1,32 @@
+import QtQuick
+import Quickshell.Widgets
+
+Item {
+    id: root
+
+    property string source: ""
+    property int glyphSize: 14
+
+    readonly property var sourceAsset: ({
+            "flatpak": "../../assets/package-sources/flatpak.svg",
+            "snap": "../../assets/package-sources/snap.svg",
+            "appimage": "../../assets/package-sources/appimage.svg",
+            "nix": "../../assets/package-sources/nix.svg"
+        })
+
+    readonly property string assetPath: sourceAsset[source] || ""
+
+    visible: assetPath.length > 0
+    implicitWidth: glyphSize
+    implicitHeight: glyphSize
+
+    IconImage {
+        anchors.fill: parent
+        source: root.assetPath ? Qt.resolvedUrl(root.assetPath) : ""
+        implicitSize: root.glyphSize * 2
+        backer.sourceSize: Qt.size(root.glyphSize * 2, root.glyphSize * 2)
+        smooth: true
+        mipmap: true
+        asynchronous: true
+    }
+}