[Kbm] Save the remaps to file[part-1] (#2184)

* Added Inital FileWatcher Implementation

* Added logic to read remap from file

* Added remap logic save to file

* Refactor code

* Moved the strings to constant file

* Added logic to handle Win key

* Updated filewatcher logic to avoid duplicate events

* Added comments

* Fix spacing

* Fix spacing

* Update logic to accomodate upstream merge

* Added global property name for os level shortcuts

* Added subkey for inprocess keys

* Remove non required file

* Added Changes required after merge

* Fix spacing in Helper.cpp

src/modules/keyboardmanager/common/KeyboardManagerConstants.h

@@ -0,0 +1,41 @@
+#pragma once
+#include <string>
+
+namespace KeyboardManagerConstants
+{
+    // Name of the powertoy module.
+    inline const std::wstring ModuleName = L"Keyboard Manager";
+
+    // Name of the property use to store current active configuration.
+    inline const std::wstring ActiveConfigurationSettingName = L"activeConfiguration";
+
+    // Name of the property use to store single keyremaps.
+    inline const std::wstring RemapKeysSettingName = L"remapKeys";
+
+    // Name of the property use to store single keyremaps array in case of in process approach.
+    inline const std::wstring InProcessRemapKeysSettingName = L"inProcess";
+
+    // Name of the property use to store shortcut remaps.
+    inline const std::wstring RemapShortcutsSettingName = L"remapShortcuts";
+
+    // Name of the property use to store global shortcut remaps array.
+    inline const std::wstring GlobalRemapShortcutsSettingName = L"global";
+
+    // Name of the property use to store original keys.
+    inline const std::wstring OriginalKeysSettingName = L"originalKeys";
+
+    // Name of the property use to store new remap keys.
+    inline const std::wstring NewRemapKeysSettingName = L"newRemapKeys";
+
+    // Name of the default configuration.
+    inline const std::wstring DefaultConfiguration = L"default";
+
+    // Name of the named mutex used for configuration file.
+    inline const std::wstring ConfigFileMutexName = L"PowerToys.KeyboardManager.ConfigMutex";
+
+    // Name of the dummy update file.
+    inline const std::wstring DummyUpdateFileName = L"settings-updated.json";
+
+    // Fake key code to represent VK_WIN.
+    inline const DWORD VK_WIN_BOTH = 0x104;
+}