Use fs::path::native whenever possible, avoid unnecessary fs->string conversions in GUI code (#1064)

* Use filesystem::path whenever possible, remove fs::path::string

* My hatred for Windows grows with every passing day

* More Qt stuff

* custom u8string formatter for fmt library

* Use u8string for imgui

* Fix toml errors hopefully

* Fix not printing issue

* Oh and on SDL

* I hate Windows even more today

* fix toml reading utf-8 paths

also small fix for fmt::UTF

* Formatting

* Fix QT path to run games

* Fix path logging in save data

* Fix trophy path handling

* Update game_list_frame.cpp

fixed snd0path

* Update main_window.cpp

fix snd0path

* Update main_window.cpp

* paths finally fixed

* git info in WIP versions title

---------

Co-authored-by: Vinicius Rangel <me@viniciusrangel.dev>
Co-authored-by: georgemoralis <giorgosmrls@gmail.com>

src/common/logging/formatter.h

@@ -19,3 +19,24 @@ struct fmt::formatter<T, std::enable_if_t<std::is_enum_v<T>, char>>
     }
 };
 #endif
+
+namespace fmt {
+template <typename T = std::string_view>
+struct UTF {
+    T data;
+
+    explicit UTF(const std::u8string_view view) {
+        data = T{(const char*)&view.front(), (const char*)&view.back() + 1};
+    }
+
+    explicit UTF(const std::u8string& str) : UTF(std::u8string_view{str}) {}
+};
+} // namespace fmt
+
+template <>
+struct fmt::formatter<fmt::UTF<std::string_view>, char> : formatter<std::string_view> {
+    template <typename FormatContext>
+    auto format(const UTF<std::string_view>& wrapper, FormatContext& ctx) const {
+        return formatter<std::string_view>::format(wrapper.data, ctx);
+    }
+};