Verify the game files (installer and console) #48

Nothing checks the game's data files (content/) today:

• make_sd.py (and the installer that runs it) checks only that code/cking.rpx, content/ and meta/meta.xml exist (setup.valid_game_folder). It checks the SHA-256 of cking.rpx only, not the ~16,000 data files.
• The SD card step skips files that are already there: robocopy /E skips files with the same size and date, and the MTP copy skips files with their full size. A file that is damaged but has the right size is never replaced.
• On the console, nothing checks the files at start.

So an incomplete dump, a cut-off copy or a damaged SD card shows up only as a crash somewhere in the game, often a game assert like d_s_room.cpp:637 fileList != (0) in #46. It is hard to tell apart from a bug in the port.

Idea (for later):

1. A list of the expected files with sizes and hashes for the supported games (USA 00050000-10143500 and Europe 00050000-10143600), shipped with the tools. File names, sizes and hashes only, never game data.
2. make_sd.py / the installer: check the extracted game against the list before copying, and say which files are missing or wrong.
3. Optionally, a Verify game files button in the settings menu on the console, to check sdmc:/switch/wwhd/game/ against the same list (slow on the SD card, so only on request), with a short report in the log.
4. The SD step: an option to copy everything again even if the files look the same (robocopy /IS, or an MTP copy without the size check).

Related: #46.