feat: add gulrak/filesystem submodule

... for old macs that don't have std::filesystem in their stdlib.

Signed-off-by: flow <flowlnlnln@gmail.com>

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "libraries/tomlplusplus"]
 	path = libraries/tomlplusplus
 	url = https://github.com/marzer/tomlplusplus.git
+[submodule "libraries/filesystem"]
+	path = libraries/filesystem
+	url = https://github.com/gulrak/filesystem

CMakeLists.txt

@@ -323,6 +323,7 @@ endif()
 add_subdirectory(libraries/katabasis) # An OAuth2 library that tried to do too much
 add_subdirectory(libraries/gamemode)
 add_subdirectory(libraries/murmur2) # Hash for usage with the CurseForge API
+add_subdirectory(libraries/filesystem) # Implementation of std::filesystem for old C++, for usage in old macOS
 
 ############################### Built Artifacts ###############################
 

launcher/CMakeLists.txt

@@ -976,6 +976,7 @@ target_link_libraries(Launcher_logic
     BuildConfig
     Katabasis
     Qt${QT_VERSION_MAJOR}::Widgets
+    ghc_filesystem
 )
 
 if (UNIX AND NOT CYGWIN AND NOT APPLE)

libraries/README.md

@@ -10,6 +10,14 @@ This library has served as a base for some (much more full-featured and advanced
 
 Copyright belongs to Petr Mrázek, unless explicitly stated otherwise in the source files. Available under the Apache 2.0 license.
 
+## filesystem
+
+Gulrak's implementation of C++17 std::filesystem for C++11 /C++14/C++17/C++20 on Windows, macOS, Linux and FreeBSD.
+
+See [github repo](https://github.com/gulrak/filesystem).
+
+MIT licensed.
+
 ## gamemode
 
 A performance optimization daemon.

libraries/filesystem

@@ -0,0 +1 @@
+Subproject commit cd6805e94dd5d6346be1b75a54cdc27787319dd2