Add assets and licenses

dist/qt_themes/colorful/icons/index.theme

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+[Icon Theme]
+Name=colorful
+Comment=Colorful theme
+Inherits=default
+Directories=16x16,48x48,256x256
+ 
+[16x16]
+Size=16
+
+[48x48]
+Size=48
+
+[256x256]
+Size=256

dist/qt_themes/colorful/style.qrc

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+<RCC>
+    <qresource prefix="icons/colorful">
+        <file alias="index.theme">icons/index.theme</file>
+        <file alias="16x16/lock.png">icons/16x16/lock.png</file>
+        <file alias="48x48/bad_folder.png">icons/48x48/bad_folder.png</file>
+        <file alias="48x48/chip.png">icons/48x48/chip.png</file>
+        <file alias="48x48/folder.png">icons/48x48/folder.png</file>
+        <file alias="48x48/plus.png">icons/48x48/plus.png</file>
+        <file alias="48x48/sd_card.png">icons/48x48/sd_card.png</file>
+        <file alias="256x256/plus_folder.png">icons/256x256/plus_folder.png</file>
+    </qresource>
+    <qresource prefix="colorful">
+        <file>style.qss</file>
+    </qresource>
+</RCC>

dist/qt_themes/colorful/style.qss

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+/*
+    This file is intentionally left blank.
+    We do not want to apply any stylesheet for colorful, only icons.
+*/