Initial Python bindings pass for ProjectManager

Adds dependency on pybind and interface to call o3de.py functions from c++

Code/Tools/ProjectManager/Platform/Windows/PAL_windows.cmake

@@ -8,3 +8,8 @@
 # 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.
 #
+
+set(LY_COMPILE_DEFINITIONS
+    PRIVATE
+        HAVE_ROUND # defined for Windows since http://p-nand-q.com/python/building-python-33-with-vs2013.html
+)

Code/Tools/ProjectManager/Platform/Windows/PAL_windows_files.cmake

@@ -0,0 +1,14 @@
+#
+# 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.
+#
+
+set(FILES
+    Python_windows.cpp
+)

Code/Tools/ProjectManager/Platform/Windows/Python_windows.cpp

@@ -0,0 +1,43 @@
+/*
+ * 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.
+ *
+ */
+
+#include <AzCore/PlatformDef.h>
+#include <AzCore/std/containers/unordered_set.h>
+#include <AzCore/IO/SystemFile.h>
+#include <AzCore/IO/Path/Path.h>
+#include <AzFramework/StringFunc/StringFunc.h>
+
+namespace Platform
+{
+    extern bool InsertPythonLibraryPath(AZStd::unordered_set<AZStd::string>& paths, const char* pythonPackage, const char* engineRoot, const char* subPath);
+
+    bool InsertPythonBinaryLibraryPaths(AZStd::unordered_set<AZStd::string>& paths, const char* pythonPackage, const char* engineRoot)
+    {
+        bool succeeded = true;
+        
+        succeeded = succeeded && InsertPythonLibraryPath(paths, pythonPackage, engineRoot, "python/runtime/%s/python");
+        succeeded = succeeded && InsertPythonLibraryPath(paths, pythonPackage, engineRoot, "python/runtime/%s/python/lib");
+        succeeded = succeeded && InsertPythonLibraryPath(paths, pythonPackage, engineRoot, "python/runtime/%s/python/lib/site-packages");
+        succeeded = succeeded && InsertPythonLibraryPath(paths, pythonPackage, engineRoot, "python/runtime/%s/python/DLLs");
+
+        return succeeded;
+    }
+
+    AZStd::string GetPythonHomePath(const char* pythonPackage, const char* engineRoot)
+    {
+        // append lib path to Python paths
+        AZ::IO::FixedMaxPath libPath = engineRoot;
+        libPath /= AZ::IO::FixedMaxPathString::format("python/runtime/%s/python", pythonPackage);
+        libPath = libPath.LexicallyNormal();
+        return libPath.String();
+    }
+}