Lua: Add icon for Qt Creator Lua Plugin wizard

Change-Id: I00db10401aaaddc3dbb0fab96e577268aa43f149
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/lua/wizards/plugin/wizard.json

@@ -8,7 +8,8 @@
     "trDescription": "Creates a custom Qt Creator Lua plugin.",
     "trDisplayName": "Qt Creator Lua Plugin",
     "trDisplayCategory": "Library",
-    "iconText": "LuaP",
+    "icon": "icon.png",
+    "iconKind": "Themed",
     "featuresRequired": [],
     "options": [
         {

src/plugins/lua/wizards/wizards.qrc

@@ -7,5 +7,7 @@
     <file>plugin/project.json</file>
     <file>plugin/wizard.json</file>
     <file>plugin/.luarc.json</file>
+    <file>plugin/icon.png</file>
+    <file>plugin/icon@2x.png</file>
   </qresource>
 </RCC>

src/tools/icons/qtcreatoricons.svg

@@ -1975,6 +1975,48 @@
            id="path4127-25-8" />
       </g>
     </g>
+    <g
+       id="src/plugins/lua/wizards/plugin/icon">
+      <use
+         transform="translate(360,60)"
+         style="display:inline"
+         x="0"
+         y="0"
+         xlink:href="#backgroundRect_60_60"
+         id="use2673"
+         width="100%"
+         height="100%" />
+      <use
+         style="display:inline"
+         x="0"
+         y="0"
+         xlink:href="#wizardicons_puzzlepiece"
+         id="use2675"
+         width="100%"
+         height="100%"
+         transform="translate(60,60)" />
+      <g
+         id="g9737">
+        <circle
+           style="fill:#999999;stroke:#000000"
+           id="path9543-7"
+           cx="393.5"
+           cy="232.5"
+           r="5" />
+        <circle
+           style="fill:#999999;stroke:#000000"
+           id="path6651"
+           cx="377.5"
+           cy="248.5"
+           r="15" />
+        <circle
+           style="fill:#ffffff"
+           id="path9543"
+           cx="383"
+           cy="243"
+           r="5" />
+      </g>
+    </g>
     <g
        id="share/qtcreator/templates/wizards/projects/vcs/mercurial/icon">
       <use