many more optimisations. cleaned up fs code. bug fixes etc (see below).

- fix usb using the wrong year when polling the timestamp.
- fs file/dir has been re-written to allow for simplified calling and remove the need of manually closing.
- add SetSize for stdio by using ftruncate.
- don't truncate the file when opened in stdio.
- add getcount api for stdio.
- display file/dir count in filebrowser for non-native fs.
- allow hash to be used on non-native fs.
- slightly optimise nro parsing by manually calculating nro size rather than doing an os call.
- slightly optimise nro parsing by keeping the fs struct alive between calls, rather than creating a new one on the stack.
- fix filebrowser peeking into zip files that are stored on non-sd fs.
- set the timestamp of a file moved to a stdio location (cut/paste).
- slightly optimise daybreak update folder detection by skipping opening/polling the dir size.
- set the fullpath of the file thats being hashed in progress box.

sphaira/source/ui/menus/ghdl.cpp

@@ -162,11 +162,9 @@ auto DownloadApp(ProgressBox* pbox, const GhApiAsset& gh_asset, const AssetEntry
                     R_THROW(rc);
                 }
 
-                FsFile f;
+                fs::File f;
                 R_TRY(fs.OpenFile(file_path, FsOpenMode_Write, &f));
-                ON_SCOPE_EXIT(fsFileClose(&f));
-
-                R_TRY(fsFileSetSize(&f, info.uncompressed_size));
+                R_TRY(f.SetSize(info.uncompressed_size));
 
                 std::vector<char> buf(chunk_size);
                 s64 offset{};
@@ -179,7 +177,7 @@ auto DownloadApp(ProgressBox* pbox, const GhApiAsset& gh_asset, const AssetEntry
                         R_THROW(0x1);
                     }
 
-                    R_TRY(fsFileWrite(&f, offset, buf.data(), bytes_read, FsWriteOption_None));
+                    R_TRY(f.Write(offset, buf.data(), bytes_read, FsWriteOption_None));
 
                     pbox->UpdateTransfer(offset, info.uncompressed_size);
                     offset += bytes_read;