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/yati/yati.cpp

@@ -1378,15 +1378,11 @@ Result InstallInternalStream(ui::ProgressBox* pbox, std::shared_ptr<source::Base
 
 } // namespace
 
-Result InstallFromFile(ui::ProgressBox* pbox, FsFileSystem* fs, const fs::FsPath& path, const ConfigOverride& override) {
+Result InstallFromFile(ui::ProgressBox* pbox, fs::Fs* fs, const fs::FsPath& path, const ConfigOverride& override) {
     return InstallFromSource(pbox, std::make_shared<source::File>(fs, path), path, override);
     // return InstallFromSource(pbox, std::make_shared<source::StreamFile>(fs, path), path, override);
 }
 
-Result InstallFromFile(ui::ProgressBox* pbox, const fs::FsPath& path, const ConfigOverride& override) {
-    return InstallFromFile(pbox, nullptr, path, override);
-}
-
 Result InstallFromSource(ui::ProgressBox* pbox, std::shared_ptr<source::Base> source, const fs::FsPath& path, const ConfigOverride& override) {
     const auto ext = std::strrchr(path.s, '.');
     R_UNLESS(ext, Result_ContainerNotFound);