Kde: Add splashscreen theme

kde/look-and-feel/contents/splash/.directory

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+[Dolphin]
+Timestamp=2019,6,23,12,1,37
+Version=4

kde/look-and-feel/contents/splash/Splash.qml

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+import QtQuick 2.5
+
+
+Image {
+    id: root
+    source: "images/background.png"
+
+    property int stage
+
+    onStageChanged: {
+        if (stage == 1) {
+            introAnimation.running = true
+        }
+    }
+
+
+    Item {
+        id: content
+        anchors.fill: parent
+        opacity: 0
+        TextMetrics {
+            id: units
+            text: "M"
+            property int gridUnit: boundingRect.height
+            property int largeSpacing: units.gridUnit
+            property int smallSpacing: Math.max(2, gridUnit/4)
+        }
+
+        Image {
+            id: logo
+            //match SDDM/lockscreen avatar positioning
+            property real size: units.gridUnit * 12
+
+            anchors.centerIn: parent
+
+            source: "images/sweetlogo.png"
+
+            sourceSize.width: size
+            sourceSize.height: size
+        }
+
+        Image {
+            id: busyIndicator
+            //in the middle of the remaining space
+            y: parent.height - (parent.height - logo.y) / 3 - height/2
+            anchors.horizontalCenter: parent.horizontalCenter
+            source: "images/busy.svg"
+            sourceSize.height: units.gridUnit * 3
+            sourceSize.width: units.gridUnit * 3
+            RotationAnimator on rotation {
+                id: rotationAnimator
+                from: 0
+                to: 360
+                duration: 800
+                loops: Animation.Infinite
+            }
+        }
+
+    }
+
+    OpacityAnimator {
+        id: introAnimation
+        running: false
+        target: content
+        from: 0
+        to: 1
+        duration: 1000
+        easing.type: Easing.InOutQuad
+    }
+}

kde/look-and-feel/contents/splash/images/.directory

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+[Dolphin]
+PreviewsShown=true
+Timestamp=2019,6,23,12,8,17
+Version=4

kde/look-and-feel/contents/splash/images/busy.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Gravit.io -->
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="isolation:isolate" viewBox="0 0 48 48" width="48pt" height="48pt"><defs><clipPath id="_clipPath_hSIrhqq9cfniBm1ZZtvRDA2F4QnFRqXQ"><rect width="48" height="48"/></clipPath></defs><g clip-path="url(#_clipPath_hSIrhqq9cfniBm1ZZtvRDA2F4QnFRqXQ)"><rect width="48" height="48" style="fill:rgb(81,81,81)" fill-opacity="0"/><path d=" M 24 47.5 C 10.9 47.5 0.3 37 0.3 24 C 0.3 11 10.9 0.5 24 0.5 C 37.1 0.5 47.7 11 47.7 24 C 47.7 37 37.1 47.5 24 47.5 Z  M 24 3.5 C 12.6 3.5 3.3 12.7 3.3 24 C 3.3 35.3 12.6 44.5 24 44.5 C 35.4 44.5 44.7 35.3 44.7 24 C 44.7 12.7 35.4 3.5 24 3.5 Z " fill="rgb(22,25,37)" fill-opacity="0.5"/><linearGradient id="_lgradient_1" x1="-0.014458464773922156" y1="0.009839246119734024" x2="1.0164565923220248" y2="1.0722930524759795" gradientTransform="matrix(25.2,0,0,25,0.5,22.5)" gradientUnits="userSpaceOnUse"><stop offset="0%" stop-opacity="1" style="stop-color:rgb(249,212,35)"/><stop offset="51.56237565086822%" stop-opacity="1" style="stop-color:rgb(255,78,80)"/><stop offset="99.1304347826087%" stop-opacity="1" style="stop-color:rgb(138,35,135)"/></linearGradient><path d=" M 24.2 47.5 C 11.1 47.5 0.5 37 0.5 24 C 0.5 23.2 1.2 22.5 2 22.5 C 2.8 22.5 3.5 23.2 3.5 24 C 3.5 35.3 12.8 44.5 24.2 44.5 C 25 44.5 25.7 45.2 25.7 46 C 25.7 46.8 25 47.5 24.2 47.5 Z " fill="url(#_lgradient_1)"/></g></svg>