Project Manager Can Cancel Project Builds (#1694)

* Fixed misc building and project screen bugs, added ability to cancel active builds and queued builds

* Cancelling in-progress cmake build working

Signed-off-by: nggieber <nggieber@amazon.com>

Code/Tools/ProjectManager/Source/ProjectBuilderWorker.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project. For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ * 
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+#pragma once
+
+#if !defined(Q_MOC_RUN)
+#include <ProjectInfo.h>
+#include <AzCore/Outcome/Outcome.h>
+
+#include <QObject>
+#endif
+
+QT_FORWARD_DECLARE_CLASS(QProcess)
+
+namespace O3DE::ProjectManager
+{
+    class ProjectBuilderWorker : public QObject
+    {
+        // QProcess::waitForFinished uses -1 to indicate that the process should not timeout
+        static constexpr int MaxBuildTimeMSecs = -1;
+        // Build was cancelled
+        static const QString BuildCancelled;
+
+        Q_OBJECT
+
+    public:
+        explicit ProjectBuilderWorker(const ProjectInfo& projectInfo);
+        ~ProjectBuilderWorker() = default;
+
+        QString GetLogFilePath() const;
+
+    public slots:
+        void BuildProject();
+
+    signals:
+        void UpdateProgress(int progress);
+        void Done(QString result = "");
+
+    private:
+        AZ::Outcome<void, QString> BuildProjectForPlatform();
+        void QStringToAZTracePrint(const QString& error);
+
+        QProcess* m_configProjectProcess = nullptr;
+        QProcess* m_buildProjectProcess = nullptr;
+        ProjectInfo m_projectInfo;
+
+        int m_progressEstimate;
+    };
+} // namespace O3DE::ProjectManager