Allow the ability to rename the save file in game.

[echoslabs]

Allows player to rename the save file in game.
Also all saves are moved into Userpath\Saves except save.json which is copied.

[axiand]

Self-assigning this as I'm gonna be testing this code and probably making changes to the text input class

[axiand]

Went through and added some polish, as well as changes, some major and some minor.

Notably, to keep the code in one place, the input handling is now all done in the OnScreenKeyboardMenu. Also, an issue was fixed with the initial setup of the new save file directory.

This should be ready for merge, though I wouldn't mind a final round of testing.

[axiand]

It's worth mentioning that this PR also makes it so that the vanilla game's save file is completely separate from the Fuji save files.

I thought about this a little bit and imo, we're probably better off that way, with how much stuff Fuji changes about the game fundamentally, I'd rather keep the files separate than risk corruption back in vanilla.

[echoslabs]

Thanks for cleaning it up and fixing bugs!

[psyGamer]

I might as well leave my thoughts here too:

• I don't like how it's split into 2 menu instead of one. It could just straigh up go to the on-screen keyboard. You could just accept / cancel with Enter / ESC. For controllers, "Accept" and "Cancel" could just be buttons like "Space".
• Pressing Enter doesn't even seem to work? I can exit the on-screen keyboard.
• You are renaming the file not the save. Imo you should be editing an arbitrary string associated as the name for the file instead. That means the save files would either be indexed or maybe a sanitized version of the inputted name.
• You can name a file with just an empty string or whitespace
• Your method of implementing the direct keyboard input is just bad. Sorry to put it so bluntly, but thats the truth. You map the keyboard keys directly to characters. Now that seems fine at first, however you do realize that the US isnt the only country on the world, right? For example the german layout swaps Y and Z, but this method doesn't care about that or about any other keyboard mapping (I imagine things like DVORAK would just completely break). Instead you should be using a text input API and luckily Foster even provides one: Input.OnTextEvent.