Create the Project Manager project (#320)

* Created the Project Manager project with a barebone styled window and rough sketch of first screen

* Renamed to Project Manager, ect.

* Corrected string name for projectmanager and added comments on getting engine path

* Changed output name for Project Manager to lowercase o3de

* Added header guards

Code/Tools/ProjectManager/CMakeLists.txt

@@ -0,0 +1,41 @@
+#
+# All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+# its licensors.
+#
+# For complete copyright and license terms please see the LICENSE at the root of this
+# distribution (the "License"). All use of this software is governed by the License,
+# or, if provided, by the license below or the license accompanying this file. Do not
+# remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#
+
+if(NOT PAL_TRAIT_BUILD_HOST_TOOLS)
+    return()
+endif()
+
+ly_add_target(
+    NAME ProjectManager APPLICATION
+    OUTPUT_NAME o3de
+    NAMESPACE AZ
+    AUTOMOC
+    AUTOUIC
+    AUTORCC
+    FILES_CMAKE
+        project_manager_files.cmake
+        Platform/${PAL_PLATFORM_NAME}/PAL_${PAL_PLATFORM_NAME_LOWERCASE}.cmake
+    INCLUDE_DIRECTORIES
+        PUBLIC
+            .
+        PRIVATE
+            source
+
+    BUILD_DEPENDENCIES
+        PRIVATE
+            3rdParty::Qt::Core
+            3rdParty::Qt::Concurrent
+            3rdParty::Qt::Widgets
+            AZ::AzCore
+            AZ::AzFramework
+            AZ::AzToolsFramework
+            AZ::AzQtComponents
+)