Doxygen: Amend minor issues (#2593)

Corrects a few issues with regards to Doxygen documentation, for example:

- Incorrect parameter referencing.
- Missing @param tags.
- Typos in @param tags.

and a few minor other issues.

src/core/file_sys/archive_extsavedata.h

@@ -52,7 +52,7 @@ private:
 
     /**
      * This holds the full directory path for this archive, it is only set after a successful call
-     * to Open, this is formed as <base extsavedatapath>/<type>/<high>/<low>.
+     * to Open, this is formed as `<base extsavedatapath>/<type>/<high>/<low>`.
      * See GetExtSaveDataPath for the code that extracts this data from an archive path.
      */
     std::string mount_point;