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/SettingsAPI/settings_helpers.cpp

@@ -0,0 +1,80 @@
+#include "pch.h"
+#include "settings_helpers.h"
+
+namespace PTSettingsHelper
+{
+    constexpr inline const wchar_t* settings_filename = L"\\settings.json";
+    constexpr inline const wchar_t* log_settings_filename = L"log_settings.json";
+
+    std::wstring get_root_save_folder_location()
+    {
+        PWSTR local_app_path;
+        winrt::check_hresult(SHGetKnownFolderPath(FOLDERID_LocalAppData, 0, NULL, &local_app_path));
+        std::wstring result{ local_app_path };
+        CoTaskMemFree(local_app_path);
+
+        result += L"\\Microsoft\\PowerToys";
+        std::filesystem::path save_path(result);
+        if (!std::filesystem::exists(save_path))
+        {
+            std::filesystem::create_directories(save_path);
+        }
+        return result;
+    }
+
+    std::wstring get_module_save_folder_location(std::wstring_view powertoy_key)
+    {
+        std::wstring result = get_root_save_folder_location();
+        result += L"\\";
+        result += powertoy_key;
+        std::filesystem::path save_path(result);
+        if (!std::filesystem::exists(save_path))
+        {
+            std::filesystem::create_directories(save_path);
+        }
+        return result;
+    }
+
+    std::wstring get_module_save_file_location(std::wstring_view powertoy_key)
+    {
+        return get_module_save_folder_location(powertoy_key) + settings_filename;
+    }
+
+    std::wstring get_powertoys_general_save_file_location()
+    {
+        return get_root_save_folder_location() + settings_filename;
+    }
+
+    void save_module_settings(std::wstring_view powertoy_key, json::JsonObject& settings)
+    {
+        const std::wstring save_file_location = get_module_save_file_location(powertoy_key);
+        json::to_file(save_file_location, settings);
+    }
+
+    json::JsonObject load_module_settings(std::wstring_view powertoy_key)
+    {
+        const std::wstring save_file_location = get_module_save_file_location(powertoy_key);
+        auto saved_settings = json::from_file(save_file_location);
+        return saved_settings.has_value() ? std::move(*saved_settings) : json::JsonObject{};
+    }
+
+    void save_general_settings(const json::JsonObject& settings)
+    {
+        const std::wstring save_file_location = get_powertoys_general_save_file_location();
+        json::to_file(save_file_location, settings);
+    }
+
+    json::JsonObject load_general_settings()
+    {
+        const std::wstring save_file_location = get_powertoys_general_save_file_location();
+        auto saved_settings = json::from_file(save_file_location);
+        return saved_settings.has_value() ? std::move(*saved_settings) : json::JsonObject{};
+    }
+
+    std::wstring get_log_settings_file_location()
+    {
+        std::filesystem::path result(PTSettingsHelper::get_root_save_folder_location());
+        result = result.append(log_settings_filename);
+        return result.wstring();
+    }
+}