common: refactor common library pt2 (#8588)

- remove common lib
- split settings, remove common-md
- move ipc interop/kb_layout to interop
- rename core -> settings, settings -> old_settings
- os-detect header-only; interop -> PowerToysInterop
- split notifications, move single-use headers where they're used
- winstore lib
- rename com utils
- rename Updating and Telemetry projects
- rename core -> settings-ui and remove examples folder
- rename settings-ui folder + consisent common/version include

src/common/utils/appMutex.h

@@ -0,0 +1,27 @@
+#pragma once
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <Windows.h>
+#include <string>
+
+#include "wil/resource.h"
+#include <lmcons.h>
+
+namespace
+{
+    constexpr inline wchar_t POWERTOYS_MSI_MUTEX_NAME[] = L"Local\\PowerToyRunMutex";
+    constexpr inline wchar_t POWERTOYS_MSIX_MUTEX_NAME[] = L"Local\\PowerToyMSIXRunMutex";
+    constexpr inline wchar_t POWERTOYS_BOOTSTRAPPER_MUTEX_NAME[] = L"PowerToysBootstrapperMutex";
+}
+
+inline wil::unique_mutex_nothrow createAppMutex(std::wstring mutexName)
+{
+    wchar_t username[UNLEN + 1];
+    DWORD username_length = UNLEN + 1;
+    GetUserNameW(username, &username_length);
+    mutexName += username;
+    wil::unique_mutex_nothrow result{ CreateMutexW(nullptr, TRUE, mutexName.c_str()) };
+
+    return GetLastError() == ERROR_ALREADY_EXISTS ? wil::unique_mutex_nothrow{} : std::move(result);
+}