timeline refactor, bit broken rn

src/util/filesystem_.h

@@ -5,9 +5,21 @@
 
 namespace anm2ed::util::filesystem
 {
+#ifdef __unix__
+  std::string path_application_get();
+  std::string path_mime_get();
+  std::string path_icon_get();
+  std::string path_icon_file_get();
+#endif
+
+  std::string path_pref_get();
   std::string path_preferences_get();
+  std::string path_base_get();
+  std::string path_executable_get();
+
   bool path_is_exist(const std::string&);
   bool path_is_extension(const std::string&, const std::string&);
+
   std::filesystem::path path_lower_case_backslash_handle(std::filesystem::path&);
 
   class WorkingDirectory