[UI] Redesigned "Install Content" window

- Added ID for each ImGui window
- Added filesystem::CreateFolder function

src/xenia/vfs/virtual_file_system.h

@@ -51,9 +51,11 @@ class VirtualFileSystem {
 
   static X_STATUS ExtractContentFile(Entry* entry,
                                      std::filesystem::path base_path,
+                                     uint64_t& progress,
                                      bool extract_to_root = false);
   static X_STATUS ExtractContentFiles(Device* device,
-                                      std::filesystem::path base_path);
+                                      std::filesystem::path base_path,
+                                      uint64_t& progress);
   static void ExtractContentHeader(Device* device,
                                    std::filesystem::path base_path);