KBM - Set up tests for keyboard hook remapping logic (#4004)

* Add test proj, refactor proj with filters, and move single remap function to a separate header

* Moved all methods to header files

* remove more unused commented code

* Reverted sln file

* Fixed sln file

* Added interface wrapping SendInput calls

* fixed formatting

* Created test mock class

* Added keyboard input logic

* Fixed compilation errors and added nuget reference to CppWinRT

* Added tests for single key remapping

* Refactored code for adding shortcut remap tests

* Separated test classes

* Fixed tests in release mode

* Added more tests

* Resolved comments

src/modules/keyboardmanager/test/TestHelpers.cpp

@@ -0,0 +1,14 @@
+#include "pch.h"
+#include "TestHelpers.h"
+
+namespace TestHelpers
+{
+    // Function to reset the environment variables for tests
+    void ResetTestEnv(MockedInput& input, KeyboardManagerState& state)
+    {
+        input.ResetKeyboardState();
+        input.SetHookProc(nullptr);
+        state.ClearSingleKeyRemaps();
+        state.ClearOSLevelShortcuts();
+    }
+}