CompilerExplorer: Add Icon

Also adds function to FileIconProvider to register a full icon instead
of an overlay.

Change-Id: I2d9415a3b57fa50ae313ad4e52fc929b418f9708
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/compilerexplorer/compilerexplorerplugin.cpp

@@ -18,6 +18,8 @@
 
 #include <projectexplorer/jsonwizard/jsonwizardfactory.h>
 
+#include <utils/fsengine/fileiconprovider.h>
+
 #include <QMenu>
 
 using namespace Core;
@@ -42,6 +44,9 @@ public:
                                                         settings().defaultDocument().toUtf8());
         });
 
+        Utils::FileIconProvider::registerIconForMimeType(QIcon(":/compilerexplorer/logos/ce.ico"),
+                                                         "application/compiler-explorer");
+
         ProjectExplorer::JsonWizardFactory::addWizardPath(":/compilerexplorer/wizard/");
 
         ActionContainer *mtools = ActionManager::actionContainer(Core::Constants::M_TOOLS);