* Fix various bugs in opvault parsing to include: TOTP parsing, date handling, naming convention, attachments, and multiple url's.
* Remove category groups that don't have any entries.
* Simplify tests by focusing on the resulting database instead of the parsing mechanics.
* Remove proprietary "freddy" opvault in favor of self-made "keepassxc" opvault.
* Fix#4069, select opvault file on macOS
This makes most tests run successfully with asan.
The GUI tests still have a bunch of leaks, some from library code, and
some that look real but which I didn't immediately manage to figure out.
* TestOpVaultReader: use QSharedPointer
* Support importing 1Password vaults (.opvault folders) into KDBX database
* Entry attributes are filled based on section and field name
* Expiration dates are set for entries
* Entry URL's are set from a wider array of fields
