Added Listing directories and filtering filenames by regex

src/xenia/base/filesystem.h

@@ -13,6 +13,7 @@
 #include <filesystem>
 #include <iterator>
 #include <memory>
+#include <regex>
 #include <string>
 #include <string_view>
 #include <vector>
@@ -123,6 +124,9 @@ struct FileInfo {
 };
 bool GetInfo(const std::filesystem::path& path, FileInfo* out_info);
 std::vector<FileInfo> ListFiles(const std::filesystem::path& path);
+std::vector<FileInfo> ListDirectories(const std::filesystem::path& path);
+std::vector<FileInfo> FilterByName(const std::vector<FileInfo>& files,
+                                   const std::regex pattern);
 
 #if XE_PLATFORM_ANDROID
 void AndroidInitialize();