Refactor: Use SHA256 hash for registry keys related to file paths

[seer-by-sentry]

Resolved / Related Issues

To prevent extra work, all changes to the Files codebase must link to an approved issue marked as Ready to build. Please insert the issue number following the hashtag with the issue number that this Pull Request resolves.

• Closes FILES-APP-37R

Steps used to test these changes

Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.

1. Verified that registry key creation no longer fails when using long file paths.
2. Confirmed that LayoutPreferencesDatabase and FileTagsDatabase now use SHA256 hashes of file paths as registry subkeys.
3. Ensured that file layout preferences and file tags are correctly saved and retrieved after the change.
4. Tested with files having special characters in their paths to ensure compatibility.
5. Compared registry entries before and after the change to verify the use of SHA256 hashes.