cyberpunk fix cache crash

[Kraken0666]

Fix FileNotFoundError in Cyberpunk cache detection.

• Guard Path.samefile() and filecmp.cmp() with existence checks
• Prevent crash when r6/cache files (e.g. final.redscripts) are missing
• Ensures MO2 startup does not fail on clean or partially-modded setups

[ZashIn]

Thx for you PR, but you need to rebase on latest master. Currently, you are reversing several changes.

About your fix: the baseline of your suggestion is to:

• check game_file.exists() before any .samefile() checks
• check if backups exists before comparing backup files

I agree with the game_file.exists() check, but the other checks are unnecessary, since the boolean evaluation is from left to right and .findFiles() returns an empty array when no files are found. So this is false with no backup file found:

modorganizer-basic_games/games/game_cyberpunk2077.py

Lines 661 to 665 in e293a98

	(
	backup_files := self._organizer.findFiles(
	file.parent, f"{file.name}.bk"
	)
	)

[ZashIn]

So this PR can be simplified into adding

if not game_file.exists():
    return False

after:

modorganizer-basic_games/games/game_cyberpunk2077.py

Line 652 in e293a98

game_file = data_path.absolute() / file