moved alphaover to external file format

app/shaders/alphaover.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<effect id="org.olivevideoeditor.Olive.alphaoverblend">
+    <!-- Effect Name -->
+    <name lang="en_US">Alpha Over</name>
+    
+    <!-- Effect Category -->
+    <category lang="en_US">Blend</category>
+
+    <!-- Effect Description -->
+    <description lang="en_US">
+        A blending node that composites one texture over another using its alpha channel.
+    </description>
+
+    <!-- Blending Parameters -->
+    <param id="base_in" type="texture">
+        <name lang="en_US">Base</name>
+    </param>
+    <param id="blend_in" type="texture">
+        <name lang="en_US">Blend</name>
+    </param>
+
+    <!-- Qt Resource path to fragment shader -->
+    <fragment url=":/shaders/alphaover.frag" />
+</effect>

app/shaders/shaders.qrc

@@ -1,6 +1,7 @@
 <RCC>
     <qresource prefix="/shaders">
         <file>alphaover.frag</file>
+        <file>alphaover.xml</file>
         <file>boxblur.frag</file>
         <file>boxblur.xml</file>
         <file>crossdissolve.frag</file>