First 5 blocks are reserved for file accessing info, but we should include them when checking length
Closes#3468
Capture the bool indicating Japanese for the save file, so box names are now read correctly (if changed from game's default).
Existing `get`/`set` logic is flawed in that it doesn't work on Big Endian operating systems, and it allocates heap objects when it doesn't need to.
`System.Buffers.Binary.BinaryPrimitives` in the `System.Memory` NuGet package provides both Little Endian and Big Endian methods to read and write data; all the `get`/`set` operations have been reworked to use this new API. This removes the need for PKHeX's manual `BigEndian` class, as all functions are already covered by the BinaryPrimitives API.
The `StringConverter` has now been rewritten to accept a Span to read from & write to, no longer requiring a temporary StringBuilder.
Other Fixes included:
- The Super Training UI for Gen6 has been reworked according to the latest block structure additions.
- Cloning a Stadium2 Save File now works correctly (opening from the Folder browser list).
- Checksum & Sanity properties removed from parent PKM class, and is now implemented via interface.
Retain a stringbuilder to mutate the string rather than finalizing temporary strings
yields some speed improvements (less gen0 string objects allocated)
GCI, DSV, DUC are already supported, so I've written the abstraction for those and seed the Handler list on startup.
Can add a new class with recognition via SaveUtil.Handlers.Add(myHandler);
Remove some unnecessary properties from SaveFile
Enumerate checksum flag results for GC memcard checking
Remove unnecessary checks on savefile type
Add some documentation
Decapitalize some method parameters
be explicit that the string is empty rather than possibly missing
disallow encrypted export for BK4 (they're not encrypted), removes type
check
simplify replaceall in showdownset (don't call ReplaceAll 4x, just get
valid chars and rebuild)
simplify get ribbon sprite name (precompute ToLower and appended values
