This PR extends the handling of excluded file attributes on Windows to include additional values that are present in Windows 10+11, but are not yet part of the .NET file attributes.
Specifically, this handles the `FILE_ATTRIBUTE_RECALL_ON_OPEN` and `FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS` attributes which are used to signal files are not available locally and will be fetched on access.
On Windows, a new option `--exclude-non-local-files` is added which will simply update `--exclude-files-attributes` with `Offline,RecallOnOpen,RecallOnDataAccess` such that setting the option will exclude offline files from the backup, without requiring that the user is aware of the attribute names or effects.
For all platforms, this PR also updates the parsing of the `--exclude-files-attributes` so it is now a flags-type enum and will validate the input as well as show the possible options in help and dropdowns.
Kenneth Skovhede
ba58064de8